https://bugs.winehq.org/show_bug.cgi?id=42720
--- Comment #5 from Fincer fincer89@hotmail.com --- Thank you for fast response!
Well well, this was simpler than I thought. Clean prefix = everything works. With winepulse.drv, too. The program needs msxml3 override, but that's another issue.
Lesson number one: always use clean prefix.
The issue can be closed as invalid.
Sorry for taking your time.