https://bugs.winehq.org/show_bug.cgi?id=52678
--- Comment #4 from Matti Viljanen matti.viljanen@iki.fi --- (In reply to Jacek Caban from comment #3)
Does this patch help? https://source.winehq.org/patches/data/229929
Yes, that helps! I can now successfully manipulate the connections and start the application.
I haven't tested the application any further yet, but this specific issue is at least fixed for me.