I changed video settings now I see nothing, is there a way to fix?

Do I have to reinstall? even if I reboot as soon as I launch, it goes black…
Luckily I have a backup pc, but I am hoping there is a quick fix.
Maybe a change in the game file?

Thanks,

Go to the game’s directory ( steam\steamapps\common\grim dawn ) and launch repair.exe.

Thank you very much!

This post saved my behind so much. Thanks a bunch! (= (=