dspMIXfx UR-C doesn't find my interface anymore on MacOS

Hi there,
I probably have made a mistake by updating my OSX (now version 13.4 )
Since that day the software doesn’t find the interface anymore although my Mac finds it in the system
Can anybody body her me?
My iMac is a 2019 model with a 3 GHz 6-Core Intel Core i5 Chip.

I have deinstalled and reinstalled several times - maybe I am doing something wrong basically - but I don’t have a clue what this could be.

Thanks a lot and best regards,
Arndt from Germany