Linux appimage: moving wallpaper file from source will make it never launch until you put it back

[ghtesting2020]

Describe the bug If you move the wallpaper file from where it was set, the appimage will not launch again until you put the file back to where it was set from.

To Reproduce Steps to reproduce the behavior:

1. Put a wallpaper file in /tmp/
2. Launch the appimage
3. Add the wallpaper as a source/create profile and set it
4. Close the appimage after the wallpaper has been set
5. Move the wallpaper file from /tmp/ or wherever you had it
6. appimage will not launch again until you put the file back. a reboot did not help

Expected behavior The appimage should still launch but display a "missing file" or similar

Screenshots n/a

Desktop (please complete the following information):

• OS: arch linux
• Desktop Environment on Linux:  kde plasma 5.26.4-1
• Superpaper package & version: AppImage v.2.2.1

Additional context n/a

Logging / debugging contents: n/a

[ghtesting2020]

another workaround is to delete the config in : ~/.config/superpaper/