Yepp - did that. Actually everything in the Avalanche Studios\GenerationZero folder.
I think I´ll wait for the next update to see if it solves this. Hoping…
If not, reinstall will be the next step…
If that doesn´t work - it´s a great game - why not put 100 + hours in to it again!
The steam file check showed no errors then ? At least that would be my first step, to let Steam validate the game files
And as a precaution try to copy the two save files away. At least from time to time or better before/after each game session. This way it’s highly unlikely that you loose progress.
On the left side where all your games are listed, rightklick on Generation Zero and select properties.
A new window will show where you select the tab local files there you’ll find check files for errors (or something similar… Sorry I’m using the german interface, but it should be self explanatory… I guess…)