When I read that, I thought you were from Germany
I did not say that! It was just a possibility because of a strange reported error.
this may be the error. But the GOG version didn't work for you either, weird.
This you have seen?:
The mod is NOT compatible with any other mod, no matter how small the other one is!!!!
The beginning is quite hard, but very interesting.
Be careful that you lose very few armies in the first room, because the second will be even more difficult.
Just message me for tips/help.
Regards, Marlow