bug: Error in terminal on first use

[VorpalBlade]

I confirm this bug has not already been reported

• I have searched the issues and this bug has not been reported previously

Describe the bug

❯ ./quickgui-1.2.10+1-linux.AppImage
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Invalid argument(s): null is not a String or Directory
#0      _Directory.current= (dart:io/directory_impl.dart:56)
#1      Directory.current= (dart:io/directory.dart:174)
#2      _DownloaderMenuState.build.<anonymous closure>.<anonymous closure> (package:quickgui/src/widgets/home_page/downloader_menu.dart:61)
#3      State.setState (package:flutter/src/widgets/framework.dart:1203)
#4      _DownloaderMenuState.initState.<anonymous closure> (package:quickgui/src/widgets/home_page/downloader_menu.dart:24)
#5      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:847)
#6      Future._propagateToListeners (dart:async/future_impl.dart:876)
#7      Future._completeWithValue (dart:async/future_impl.dart:652)
<asynchronous suspension>

To Reproduce
Steps to reproduce the behavior:

1. Install Quickemu from Arch Linux AUR
2. Download AppImage for Quickgui
3. Launch it for first time (never having used quickemu or quickgui before)
4. Click "Create new machines"
5. See error in terminal

Expected behavior
No error in terminal

Desktop (please complete the following information):

• Quickgui Versdion: 1.2.10 (from AppImage)
• OS: Arch Linux
• Version: N/A (rolling release)
• KDE Plasma 6.1.4 (Wayland)

Screenshots
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Additional context
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