Hi nervenbuendel,
Looking at the information you provided last night it looks like you were pressing "Continue Arcade Game" in the main menu? If that's the case can you send me your preferences file please? You should find it here:
/home/stephan/.local/share/ExecutionUnit/SmithAndWinston/userprefs
If you could email it to me at dazza@executionunit.com I'll see what's up. I don't think this is Linux specific.