1 and 2 works fine but 3 crashes immediatly after version selection. (Win 10 btw)
Does anyone have a solution?

Same problem occured with Win7.
But I think I found a solution!

In another topic on this issue a user stated that the english version works.
While I do not intend to play an "original german" game in english, that made me curious :-).

So I installed the english version as well and it really works fine.
Comparing the dosbox-configs etc. showed no difference, but comparing the install-directories showed, that in the english version there are two additional folders "TEMP" and "CTEMP" .

Surprinsingly, just creating those two (empty) folders in the german version fixed the crashing on startup for me.

Hope this helps!

PS: Maybe GOG could fix this in a future update?!

@Starblade78
thanks for this solution with the two additional folders.
that was the solution for me, too.

@Starblade78
Works perfect now! Thank you very much!