[Imp]

This game does not need compatibility mode, it is very stable including alt tabing in windows mode.
I run in windows desktop mode or sometimes a smaller window size if I am monotiring work stuff.
Only issue was splash screen but I think that’s fixed now, you can disable it.

You did follow install instructions and not install in default directory?
I never use but as mentioned full screen can cause problems on some computers use window for best performance.