For the record - a new install with the gog version did not work and caused the same problems. So I've installed the steam version - this works without any problems.

Ok, thanks. I'll try a new install.

@jip i used the "repair" function at gog galaxy. so there was a small update, but without effect. Same issues. Supreme Commander is still fine - FAF isn't game_17845090.log

@jip Here is the complete folder - thanks in advance logs.zip

@jip There it is client.log
Do you need any more?

It reads 2022.8.0. - sorry for the effort

Am I that stupid? Spiler: yes I am. But the video settings are not working properly
https://imgur.com/RPpmNFE
How do I change them without start menu?

I literally can't launch a game
https://imgur.com/MA6TQSs

Yes, without any problems.

Nope, I tried custom games and Co-op - i can't launch a game.