Here ist my exception error, when I press F1.
I also attached the pipe file again.
I'm also running the german version of the game.
And it doesn't matter on my Win10 machine if I'm running it windowed or full-screen.
The game by uses F1 to change the language during gameplay. To avoid this either set the trainer activation key to something different, or after activation use Ctrl+H to temporarily disable the trainer hotkeys, press F1 to change the language back and then another Ctrl+H to re-enable the trainer hotkeys.