Game crashes on "switch to fullscreen"

[Foopster]

Clicking "switch to fullscreen" crashes the game with an error message, as does switching to higher resolutions.

[Envane]

One of my systems just started doing this as well. I have tried changing different setting, resolutions, etc. No luck.

[Baler]

What is the error message exactly?

edit: you may find something in these results.
https://www.google.com/search?q=fullscreen+crash+site:www.project1999.com

https://www.project1999.com/forums/showpost.php?p=663459&postcount=8