Older version seems to block version 5.0

I try to run modeler V5.0 on my iMac (OS Catalina 10.15.7) but it gets stuck in a loop. Is it possible that an older installation of modeler (V0.34.3, installed in 2015) causes this? Removing the older app doesn’t help. On another Mac a fresh installation of V5.0 works fine.
Regards,

Hi, what you can try to do is to clear all temporary files of your old Modeler instance. You can find them usually at /Users/<YOUR_USER>/Library/Application Support/camunda-modeler

Many thanks! That caused indeed the problem!