diff --git a/kmc_api/kmc_file.cpp b/kmc_api/kmc_file.cpp
index 2f27e2f..681cb84 100644
--- a/kmc_api/kmc_file.cpp
+++ b/kmc_api/kmc_file.cpp
@@ -4,8 +4,8 @@
 
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_api/kmc_file.h b/kmc_api/kmc_file.h
index 3ddf981..a8010e1 100644
--- a/kmc_api/kmc_file.h
+++ b/kmc_api/kmc_file.h
@@ -4,8 +4,8 @@
 
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
  */
 
 #ifndef _KMC_FILE_H
diff --git a/kmc_api/kmer_api.cpp b/kmc_api/kmer_api.cpp
index 48c50b4..13903c7 100644
--- a/kmc_api/kmer_api.cpp
+++ b/kmc_api/kmer_api.cpp
@@ -4,8 +4,8 @@
 
   Authors: Sebastian Deorowicz and Agnieszka Debudaj-Grabysz
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 
diff --git a/kmc_api/kmer_api.h b/kmc_api/kmer_api.h
index e2ea4c2..09b2cc6 100644
--- a/kmc_api/kmer_api.h
+++ b/kmc_api/kmer_api.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz and Agnieszka Debudaj-Grabysz
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _KMER_API_H
diff --git a/kmc_api/kmer_defs.h b/kmc_api/kmer_defs.h
index 8bd87fe..2c69c6a 100644
--- a/kmc_api/kmer_defs.h
+++ b/kmc_api/kmer_defs.h
@@ -4,16 +4,16 @@
 
   Authors: Sebastian Deorowicz and Agnieszka Debudaj-Grabysz
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 
 #ifndef _KMER_DEFS_H
 #define _KMER_DEFS_H
 
-#define KMC_VER		"3.0.1"
-#define KMC_DATE	"2017-02-08"
+#define KMC_VER		"3.1.0"
+#define KMC_DATE	"2018-05-10"
 
 #define MIN(x,y)	((x) < (y) ? (x) : (y))
 
diff --git a/kmc_api/mmer.cpp b/kmc_api/mmer.cpp
index bf1edc4..ce1ecec 100644
--- a/kmc_api/mmer.cpp
+++ b/kmc_api/mmer.cpp
@@ -5,8 +5,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "../kmc_api/mmer.h"
diff --git a/kmc_api/mmer.h b/kmc_api/mmer.h
index acfcfbd..3303777 100644
--- a/kmc_api/mmer.h
+++ b/kmc_api/mmer.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _MMER_H
diff --git a/kmc_dump/kmc_dump.cpp b/kmc_dump/kmc_dump.cpp
index f429b7c..d35e545 100644
--- a/kmc_dump/kmc_dump.cpp
+++ b/kmc_dump/kmc_dump.cpp
@@ -7,8 +7,8 @@
 
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_dump/nc_utils.cpp b/kmc_dump/nc_utils.cpp
index 90c033c..0eee4e0 100644
--- a/kmc_dump/nc_utils.cpp
+++ b/kmc_dump/nc_utils.cpp
@@ -7,8 +7,8 @@
 
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_dump/nc_utils.h b/kmc_dump/nc_utils.h
index aa124ee..f6dce8e 100644
--- a/kmc_dump/nc_utils.h
+++ b/kmc_dump/nc_utils.h
@@ -7,8 +7,8 @@
 
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include <string>
diff --git a/kmc_dump_sample/kmc_dump_sample.cpp b/kmc_dump_sample/kmc_dump_sample.cpp
index aca3180..4197c16 100644
--- a/kmc_dump_sample/kmc_dump_sample.cpp
+++ b/kmc_dump_sample/kmc_dump_sample.cpp
@@ -7,8 +7,8 @@
 
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/asmlib_wrapper.h b/kmc_tools/asmlib_wrapper.h
index cff1b8c..bac2707 100644
--- a/kmc_tools/asmlib_wrapper.h
+++ b/kmc_tools/asmlib_wrapper.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 
diff --git a/kmc_tools/bundle.h b/kmc_tools/bundle.h
index 9c91447..4a09935 100644
--- a/kmc_tools/bundle.h
+++ b/kmc_tools/bundle.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _BUNDLE_H
diff --git a/kmc_tools/check_kmer.h b/kmc_tools/check_kmer.h
index 46aa0ef..7496518 100644
--- a/kmc_tools/check_kmer.h
+++ b/kmc_tools/check_kmer.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _CHECK_KMER_H
diff --git a/kmc_tools/config.h b/kmc_tools/config.h
index f45328d..b5fcb83 100644
--- a/kmc_tools/config.h
+++ b/kmc_tools/config.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _CONFIG_H
diff --git a/kmc_tools/defs.h b/kmc_tools/defs.h
index 8c43fa7..bb348bf 100644
--- a/kmc_tools/defs.h
+++ b/kmc_tools/defs.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _DEFS_H
@@ -32,8 +32,8 @@ using uchar = unsigned char;
 //#define ENABLE_DEBUG
 //#define ENABLE_LOGGER
 
-#define KMC_VER		"3.0.1"
-#define KMC_DATE	"2017-02-08"
+#define KMC_VER		"3.1.0"
+#define KMC_DATE	"2018-05-10"
 
 #define DEFAULT_CIRCULAL_QUEUE_CAPACITY (4)
 
diff --git a/kmc_tools/dump_writer.h b/kmc_tools/dump_writer.h
index ff1d05a..3e7d76f 100644
--- a/kmc_tools/dump_writer.h
+++ b/kmc_tools/dump_writer.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _DUMP_WRITER_H
diff --git a/kmc_tools/expression_node.h b/kmc_tools/expression_node.h
index fce54f8..95c7985 100644
--- a/kmc_tools/expression_node.h
+++ b/kmc_tools/expression_node.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _EXPRESSION_NODE_H
diff --git a/kmc_tools/fastq_filter.cpp b/kmc_tools/fastq_filter.cpp
index bc7f321..6a4860a 100644
--- a/kmc_tools/fastq_filter.cpp
+++ b/kmc_tools/fastq_filter.cpp
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/fastq_filter.h b/kmc_tools/fastq_filter.h
index ad997df..95b27fe 100644
--- a/kmc_tools/fastq_filter.h
+++ b/kmc_tools/fastq_filter.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _FASTQ_FILTER_H
diff --git a/kmc_tools/fastq_reader.cpp b/kmc_tools/fastq_reader.cpp
index 67a105e..e23b80e 100644
--- a/kmc_tools/fastq_reader.cpp
+++ b/kmc_tools/fastq_reader.cpp
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/fastq_reader.h b/kmc_tools/fastq_reader.h
index a323ae4..ffd3258 100644
--- a/kmc_tools/fastq_reader.h
+++ b/kmc_tools/fastq_reader.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _FASTQ_READER_H
diff --git a/kmc_tools/fastq_writer.cpp b/kmc_tools/fastq_writer.cpp
index 3a0cca1..d0fdc21 100644
--- a/kmc_tools/fastq_writer.cpp
+++ b/kmc_tools/fastq_writer.cpp
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/fastq_writer.h b/kmc_tools/fastq_writer.h
index a47d500..10d7d22 100644
--- a/kmc_tools/fastq_writer.h
+++ b/kmc_tools/fastq_writer.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _FASTQ_WRITER_H
diff --git a/kmc_tools/histogram_writer.h b/kmc_tools/histogram_writer.h
index 7450373..dbd8ecb 100644
--- a/kmc_tools/histogram_writer.h
+++ b/kmc_tools/histogram_writer.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _HISTOGRAM_WRITER_H
diff --git a/kmc_tools/kmc1_db_reader.h b/kmc_tools/kmc1_db_reader.h
index 047d017..84519d6 100644
--- a/kmc_tools/kmc1_db_reader.h
+++ b/kmc_tools/kmc1_db_reader.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _KMC1_DB_READER_H
diff --git a/kmc_tools/kmc1_db_writer.h b/kmc_tools/kmc1_db_writer.h
index 7567878..db23576 100644
--- a/kmc_tools/kmc1_db_writer.h
+++ b/kmc_tools/kmc1_db_writer.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _KMC1_DB_WRITER_H
diff --git a/kmc_tools/kmc2_db_reader.h b/kmc_tools/kmc2_db_reader.h
index 95ecda1..6e2ad8e 100644
--- a/kmc_tools/kmc2_db_reader.h
+++ b/kmc_tools/kmc2_db_reader.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _KMC2_DB_READER_H
diff --git a/kmc_tools/kmc_header.cpp b/kmc_tools/kmc_header.cpp
index 453e45a..65f7092 100644
--- a/kmc_tools/kmc_header.cpp
+++ b/kmc_tools/kmc_header.cpp
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/kmc_header.h b/kmc_tools/kmc_header.h
index 9236e2a..06772c3 100644
--- a/kmc_tools/kmc_header.h
+++ b/kmc_tools/kmc_header.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _KMC_HEADER_H
diff --git a/kmc_tools/kmc_tools.cpp b/kmc_tools/kmc_tools.cpp
index c4d4ad1..040a064 100644
--- a/kmc_tools/kmc_tools.cpp
+++ b/kmc_tools/kmc_tools.cpp
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/kmer.h b/kmc_tools/kmer.h
index fdf7bb7..7782180 100644
--- a/kmc_tools/kmer.h
+++ b/kmc_tools/kmer.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _KMER_H
diff --git a/kmc_tools/meta_oper.h b/kmc_tools/meta_oper.h
index 5665efe..7eff801 100644
--- a/kmc_tools/meta_oper.h
+++ b/kmc_tools/meta_oper.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _META_OPER_H
diff --git a/kmc_tools/nc_utils.cpp b/kmc_tools/nc_utils.cpp
index 2f2179c..87c3bab 100644
--- a/kmc_tools/nc_utils.cpp
+++ b/kmc_tools/nc_utils.cpp
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/nc_utils.h b/kmc_tools/nc_utils.h
index 66c4336..8dd3606 100644
--- a/kmc_tools/nc_utils.h
+++ b/kmc_tools/nc_utils.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include <string>
diff --git a/kmc_tools/operations.h b/kmc_tools/operations.h
index 4340cb7..8fa851a 100644
--- a/kmc_tools/operations.h
+++ b/kmc_tools/operations.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _OPERATIONS_H
diff --git a/kmc_tools/output_parser.h b/kmc_tools/output_parser.h
index 52f4a87..9a70954 100644
--- a/kmc_tools/output_parser.h
+++ b/kmc_tools/output_parser.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _OUTPUT_PARSER_H
diff --git a/kmc_tools/parameters_parser.cpp b/kmc_tools/parameters_parser.cpp
index 11c7481..152005c 100644
--- a/kmc_tools/parameters_parser.cpp
+++ b/kmc_tools/parameters_parser.cpp
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/parameters_parser.h b/kmc_tools/parameters_parser.h
index 3e90201..d31a228 100644
--- a/kmc_tools/parameters_parser.h
+++ b/kmc_tools/parameters_parser.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _PARAMETERS_PARSER_H
diff --git a/kmc_tools/parser.cpp b/kmc_tools/parser.cpp
index 9a99ac9..8ffbc07 100644
--- a/kmc_tools/parser.cpp
+++ b/kmc_tools/parser.cpp
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/parser.h b/kmc_tools/parser.h
index 1fd6e4b..436b09b 100644
--- a/kmc_tools/parser.h
+++ b/kmc_tools/parser.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _PARSER_H
diff --git a/kmc_tools/percent_progress.cpp b/kmc_tools/percent_progress.cpp
index f79d0c8..0b8a23b 100644
--- a/kmc_tools/percent_progress.cpp
+++ b/kmc_tools/percent_progress.cpp
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmc_tools/percent_progress.h b/kmc_tools/percent_progress.h
index e8cc43a..9a31de8 100644
--- a/kmc_tools/percent_progress.h
+++ b/kmc_tools/percent_progress.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _PERCENT_PROGRESS_H
diff --git a/kmc_tools/queues.h b/kmc_tools/queues.h
index a8a00d7..99800e2 100644
--- a/kmc_tools/queues.h
+++ b/kmc_tools/queues.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _QUEUES_H_
diff --git a/kmc_tools/thread_watch.h b/kmc_tools/thread_watch.h
index ce6999d..a27b295 100644
--- a/kmc_tools/thread_watch.h
+++ b/kmc_tools/thread_watch.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _THREAD_WATCH_H
diff --git a/kmc_tools/timer.h b/kmc_tools/timer.h
index ffc1cd9..e906488 100644
--- a/kmc_tools/timer.h
+++ b/kmc_tools/timer.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _TIMER_H
diff --git a/kmc_tools/tokenizer.cpp b/kmc_tools/tokenizer.cpp
index eab3847..71d7c9f 100644
--- a/kmc_tools/tokenizer.cpp
+++ b/kmc_tools/tokenizer.cpp
@@ -4,7 +4,7 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
+  Version: 3.1.0
   Date   : 2017-01-28
 */
 
diff --git a/kmc_tools/tokenizer.h b/kmc_tools/tokenizer.h
index e1d7130..7e72807 100644
--- a/kmc_tools/tokenizer.h
+++ b/kmc_tools/tokenizer.h
@@ -4,8 +4,8 @@
   
   Authors: Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _TOKENIZER_H
diff --git a/kmer_counter/asmlib_wrapper.h b/kmer_counter/asmlib_wrapper.h
index 014b74d..a7ab756 100644
--- a/kmer_counter/asmlib_wrapper.h
+++ b/kmer_counter/asmlib_wrapper.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _ASMLIB_WRAPPER_H
diff --git a/kmer_counter/bam_utils.h b/kmer_counter/bam_utils.h
index d9b708b..fbf823f 100644
--- a/kmer_counter/bam_utils.h
+++ b/kmer_counter/bam_utils.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _BAM_UTILS_H
diff --git a/kmer_counter/binary_reader.h b/kmer_counter/binary_reader.h
index 4a5f724..ce4af0e 100644
--- a/kmer_counter/binary_reader.h
+++ b/kmer_counter/binary_reader.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _BINARY_READER_H
diff --git a/kmer_counter/bkb_merger.h b/kmer_counter/bkb_merger.h
index 2e70ff6..e9164d9 100644
--- a/kmer_counter/bkb_merger.h
+++ b/kmer_counter/bkb_merger.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _HBH_MERGER_H
diff --git a/kmer_counter/bkb_reader.cpp b/kmer_counter/bkb_reader.cpp
index f3562fa..d2da42b 100644
--- a/kmer_counter/bkb_reader.cpp
+++ b/kmer_counter/bkb_reader.cpp
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmer_counter/bkb_reader.h b/kmer_counter/bkb_reader.h
index a68fc46..fbe0e02 100644
--- a/kmer_counter/bkb_reader.h
+++ b/kmer_counter/bkb_reader.h
@@ -5,8 +5,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _BKB_READER_H_
diff --git a/kmer_counter/bkb_sorter.h b/kmer_counter/bkb_sorter.h
index be3182e..30f19c6 100644
--- a/kmer_counter/bkb_sorter.h
+++ b/kmer_counter/bkb_sorter.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _BKB_SORTER_H
diff --git a/kmer_counter/bkb_subbin.h b/kmer_counter/bkb_subbin.h
index bbc1243..4a77b0d 100644
--- a/kmer_counter/bkb_subbin.h
+++ b/kmer_counter/bkb_subbin.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _BKB_SUBBIN_H
diff --git a/kmer_counter/bkb_uncompactor.h b/kmer_counter/bkb_uncompactor.h
index 3ab9e79..339c1a3 100644
--- a/kmer_counter/bkb_uncompactor.h
+++ b/kmer_counter/bkb_uncompactor.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _BKB_UNCOMPACTOR_H
diff --git a/kmer_counter/bkb_writer.cpp b/kmer_counter/bkb_writer.cpp
index 9870c3b..f0dd0c4 100644
--- a/kmer_counter/bkb_writer.cpp
+++ b/kmer_counter/bkb_writer.cpp
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmer_counter/bkb_writer.h b/kmer_counter/bkb_writer.h
index 25ba56d..5c3698d 100644
--- a/kmer_counter/bkb_writer.h
+++ b/kmer_counter/bkb_writer.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _BKB_WRITER_H
diff --git a/kmer_counter/cpu_info.cpp b/kmer_counter/cpu_info.cpp
index 9c5c980..9f1b02e 100644
--- a/kmer_counter/cpu_info.cpp
+++ b/kmer_counter/cpu_info.cpp
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmer_counter/cpu_info.h b/kmer_counter/cpu_info.h
index 0cf1427..f2af3f7 100644
--- a/kmer_counter/cpu_info.h
+++ b/kmer_counter/cpu_info.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _CPU_INFO_
diff --git a/kmer_counter/defs.h b/kmer_counter/defs.h
index d57e7a1..9505246 100644
--- a/kmer_counter/defs.h
+++ b/kmer_counter/defs.h
@@ -4,15 +4,15 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _DEFS_H
 #define _DEFS_H
 
-#define KMC_VER		"3.0.1"
-#define KMC_DATE	"2017-02-08"
+#define KMC_VER		"3.1.0"
+#define KMC_DATE	"2018-05-10"
 
 #define _CRT_SECURE_NO_WARNINGS
 
diff --git a/kmer_counter/fastq_reader.cpp b/kmer_counter/fastq_reader.cpp
index 17f3d01..14217d6 100644
--- a/kmer_counter/fastq_reader.cpp
+++ b/kmer_counter/fastq_reader.cpp
@@ -5,8 +5,8 @@
 
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include <algorithm>
diff --git a/kmer_counter/fastq_reader.h b/kmer_counter/fastq_reader.h
index 9d55889..8bd1224 100644
--- a/kmer_counter/fastq_reader.h
+++ b/kmer_counter/fastq_reader.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _FASTQ_READER_H
diff --git a/kmer_counter/first_dispatch.h b/kmer_counter/first_dispatch.h
index b26fcdb..8e5cb8e 100644
--- a/kmer_counter/first_dispatch.h
+++ b/kmer_counter/first_dispatch.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 #ifndef _FIRST_DISPATCH_H
 #define _FIRST_DISPATCH_H
diff --git a/kmer_counter/intr_copy.h b/kmer_counter/intr_copy.h
index d5b4e7f..fe10a58 100644
--- a/kmer_counter/intr_copy.h
+++ b/kmer_counter/intr_copy.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _INTR_COPY_H
diff --git a/kmer_counter/kb_collector.h b/kmer_counter/kb_collector.h
index 83d4611..e0971b4 100644
--- a/kmer_counter/kb_collector.h
+++ b/kmer_counter/kb_collector.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _KB_COLLECTOR_H
diff --git a/kmer_counter/kb_completer.cpp b/kmer_counter/kb_completer.cpp
index 5a314f7..23f1d4d 100644
--- a/kmer_counter/kb_completer.cpp
+++ b/kmer_counter/kb_completer.cpp
@@ -5,8 +5,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 #include <algorithm>
 #include <numeric>
diff --git a/kmer_counter/kb_completer.h b/kmer_counter/kb_completer.h
index 1d2f979..a33b40e 100644
--- a/kmer_counter/kb_completer.h
+++ b/kmer_counter/kb_completer.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 #ifndef _KB_COMPLETER_H
 #define _KB_COMPLETER_H
diff --git a/kmer_counter/kb_reader.h b/kmer_counter/kb_reader.h
index 8707c0f..cdf3801 100644
--- a/kmer_counter/kb_reader.h
+++ b/kmer_counter/kb_reader.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _KB_READER_H
diff --git a/kmer_counter/kb_sorter.h b/kmer_counter/kb_sorter.h
index 3750a74..f51608f 100644
--- a/kmer_counter/kb_sorter.h
+++ b/kmer_counter/kb_sorter.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _KB_SORTER_H
diff --git a/kmer_counter/kb_storer.cpp b/kmer_counter/kb_storer.cpp
index 1ac1fa7..1a7408a 100644
--- a/kmer_counter/kb_storer.cpp
+++ b/kmer_counter/kb_storer.cpp
@@ -5,8 +5,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 #include <algorithm>
 #include <numeric>
diff --git a/kmer_counter/kb_storer.h b/kmer_counter/kb_storer.h
index a100097..4898bd1 100644
--- a/kmer_counter/kb_storer.h
+++ b/kmer_counter/kb_storer.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _KB_STORER_H
diff --git a/kmer_counter/kmc.h b/kmer_counter/kmc.h
index 4434f40..f4b6e2b 100644
--- a/kmer_counter/kmc.h
+++ b/kmer_counter/kmc.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _KMC_H
diff --git a/kmer_counter/kmer.cpp b/kmer_counter/kmer.cpp
index 466d8e4..278388e 100644
--- a/kmer_counter/kmer.cpp
+++ b/kmer_counter/kmer.cpp
@@ -5,8 +5,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "defs.h"
diff --git a/kmer_counter/kmer.h b/kmer_counter/kmer.h
index 89b9899..5e1a666 100644
--- a/kmer_counter/kmer.h
+++ b/kmer_counter/kmer.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _KMER_H
diff --git a/kmer_counter/kmer_counter.cpp b/kmer_counter/kmer_counter.cpp
index 7409064..0b20806 100644
--- a/kmer_counter/kmer_counter.cpp
+++ b/kmer_counter/kmer_counter.cpp
@@ -5,8 +5,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include <fstream>
diff --git a/kmer_counter/kxmer_set.h b/kmer_counter/kxmer_set.h
index ab2b4c7..1daf5b6 100644
--- a/kmer_counter/kxmer_set.h
+++ b/kmer_counter/kxmer_set.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 #ifndef _KXMER_SET_
 #define _KXMER_SET_
diff --git a/kmer_counter/mem_disk_file.cpp b/kmer_counter/mem_disk_file.cpp
index 4224ce7..6bc0516 100644
--- a/kmer_counter/mem_disk_file.cpp
+++ b/kmer_counter/mem_disk_file.cpp
@@ -5,8 +5,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "mem_disk_file.h"
diff --git a/kmer_counter/mem_disk_file.h b/kmer_counter/mem_disk_file.h
index 5ca1286..b1d1ac1 100644
--- a/kmer_counter/mem_disk_file.h
+++ b/kmer_counter/mem_disk_file.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _MEM_DISK_FILE_H
diff --git a/kmer_counter/meta_oper.h b/kmer_counter/meta_oper.h
index be86b18..df2161c 100644
--- a/kmer_counter/meta_oper.h
+++ b/kmer_counter/meta_oper.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _META_OPER_H
diff --git a/kmer_counter/mmer.cpp b/kmer_counter/mmer.cpp
index 3f0be8d..a6332ef 100644
--- a/kmer_counter/mmer.cpp
+++ b/kmer_counter/mmer.cpp
@@ -5,8 +5,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "mmer.h"
diff --git a/kmer_counter/mmer.h b/kmer_counter/mmer.h
index 758070a..3bdbf4d 100644
--- a/kmer_counter/mmer.h
+++ b/kmer_counter/mmer.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _MMER_H
diff --git a/kmer_counter/params.h b/kmer_counter/params.h
index 7ee12e5..a1ac47d 100644
--- a/kmer_counter/params.h
+++ b/kmer_counter/params.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _PARAMS_H
diff --git a/kmer_counter/percent_progress.h b/kmer_counter/percent_progress.h
index 57db3c6..95bdeec 100644
--- a/kmer_counter/percent_progress.h
+++ b/kmer_counter/percent_progress.h
@@ -5,7 +5,7 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
 Version: 3.0.0
-Date   : 2017-01-28
+Date   : 2018-05-10
 */
 
 #ifndef _PERCENT_PROGRESS_H
diff --git a/kmer_counter/prob_qual.cpp b/kmer_counter/prob_qual.cpp
index 3c0a5ec..a410980 100644
--- a/kmer_counter/prob_qual.cpp
+++ b/kmer_counter/prob_qual.cpp
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 #include "stdafx.h"
 #include "prob_qual.h"
diff --git a/kmer_counter/prob_qual.h b/kmer_counter/prob_qual.h
index 596f37d..45d4297 100644
--- a/kmer_counter/prob_qual.h
+++ b/kmer_counter/prob_qual.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _PROB_QUAL_H
diff --git a/kmer_counter/queues.h b/kmer_counter/queues.h
index c3a6246..2835abe 100644
--- a/kmer_counter/queues.h
+++ b/kmer_counter/queues.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _QUEUES_H
diff --git a/kmer_counter/radix.h b/kmer_counter/radix.h
index d772fb5..66764b7 100644
--- a/kmer_counter/radix.h
+++ b/kmer_counter/radix.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 #ifndef _RADIX_H
 #define _RADIX_H
diff --git a/kmer_counter/raduls.h b/kmer_counter/raduls.h
index e5e522e..e4f1452 100644
--- a/kmer_counter/raduls.h
+++ b/kmer_counter/raduls.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef RADULS_H
diff --git a/kmer_counter/raduls_avx.cpp b/kmer_counter/raduls_avx.cpp
index 376ec2e..864c112 100644
--- a/kmer_counter/raduls_avx.cpp
+++ b/kmer_counter/raduls_avx.cpp
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmer_counter/raduls_avx2.cpp b/kmer_counter/raduls_avx2.cpp
index 376ec2e..864c112 100644
--- a/kmer_counter/raduls_avx2.cpp
+++ b/kmer_counter/raduls_avx2.cpp
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmer_counter/raduls_impl.h b/kmer_counter/raduls_impl.h
index 40dba4b..54a8943 100644
--- a/kmer_counter/raduls_impl.h
+++ b/kmer_counter/raduls_impl.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _RADULS_IMPL_H
diff --git a/kmer_counter/raduls_sse2.cpp b/kmer_counter/raduls_sse2.cpp
index a1b5994..6d8ff4b 100644
--- a/kmer_counter/raduls_sse2.cpp
+++ b/kmer_counter/raduls_sse2.cpp
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmer_counter/raduls_sse41.cpp b/kmer_counter/raduls_sse41.cpp
index e7e9688..cb3ef60 100644
--- a/kmer_counter/raduls_sse41.cpp
+++ b/kmer_counter/raduls_sse41.cpp
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "stdafx.h"
diff --git a/kmer_counter/rev_byte.cpp b/kmer_counter/rev_byte.cpp
index 368c05c..c0314ff 100644
--- a/kmer_counter/rev_byte.cpp
+++ b/kmer_counter/rev_byte.cpp
@@ -5,8 +5,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #include "rev_byte.h"
diff --git a/kmer_counter/rev_byte.h b/kmer_counter/rev_byte.h
index 13dea63..3409254 100644
--- a/kmer_counter/rev_byte.h
+++ b/kmer_counter/rev_byte.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _REV_BYTE_H
diff --git a/kmer_counter/s_mapper.h b/kmer_counter/s_mapper.h
index 04c8e3b..38de977 100644
--- a/kmer_counter/s_mapper.h
+++ b/kmer_counter/s_mapper.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _S_MAPPER_H
diff --git a/kmer_counter/small_k_buf.h b/kmer_counter/small_k_buf.h
index 72c2f75..da9df88 100644
--- a/kmer_counter/small_k_buf.h
+++ b/kmer_counter/small_k_buf.h
@@ -4,7 +4,7 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
+  Version: 3.1.0
   Date   : 2017-01-28
 */
 
diff --git a/kmer_counter/small_sort.h b/kmer_counter/small_sort.h
index 38b2e8a..3289705 100644
--- a/kmer_counter/small_sort.h
+++ b/kmer_counter/small_sort.h
@@ -4,8 +4,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 
 Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 #ifndef _SMALL_SORT_H
 #define _SMALL_SORT_H
diff --git a/kmer_counter/splitter.h b/kmer_counter/splitter.h
index a0a607d..2c59ffc 100644
--- a/kmer_counter/splitter.h
+++ b/kmer_counter/splitter.h
@@ -4,8 +4,8 @@
   
   Authors: Sebastian Deorowicz, Agnieszka Debudaj-Grabysz, Marek Kokot
   
-  Version: 3.0.0
-  Date   : 2017-01-28
+  Version: 3.1.0
+  Date   : 2018-05-10
 */
 
 #ifndef _SPLITTER_H
diff --git a/kmer_counter/timer.cpp b/kmer_counter/timer.cpp
index 2ac0c92..0846ae5 100644
--- a/kmer_counter/timer.cpp
+++ b/kmer_counter/timer.cpp
@@ -6,8 +6,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 The source codes are based on codes written by Dennis and published:
 http://allmybrain.com/2008/06/10/timing-cc-code-on-linux/
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifdef WIN32
diff --git a/kmer_counter/timer.h b/kmer_counter/timer.h
index 5be645f..60b89b7 100644
--- a/kmer_counter/timer.h
+++ b/kmer_counter/timer.h
@@ -5,8 +5,8 @@ The homepage of the KMC project is http://sun.aei.polsl.pl/kmc
 The source codes are based on codes written by Dennis and published:
 http://allmybrain.com/2008/06/10/timing-cc-code-on-linux/
 
-Version: 3.0.0
-Date   : 2017-01-28
+Version: 3.1.0
+Date   : 2018-05-10
 */
 
 #ifndef _TIMER_H