Hi sparkertime, sorry too hear you have trouble with the version. We currently only have access to one Mac Book Pro with MacOS 10.15.4 to test Dorfromantik, it works fine there. Hopefully we can figure out what causes the issues on Mac!
I think this is a problem with how the default Archive Utility unzips the folder on a Mac. I originally had the same problem, but after I used a different one (Keka) and it worked fine.