The app does not open on macos catalina.
Yesterday I managed to install darktable 4.4.2 on Catalina. Not today.
I resorted to 4.2.1 but it doesn’t open.
Thank You.
Now works 
hire releases often have database updates - once the database is updated there’s no way back - darktable reports that via terminal … so if starting an old version darktable it won’t open