Soon after start, DevonSphere freezes

1-2 Minutes after starting, DevonSphere express freezes (spinning ball; no activity in ActivityMonitor). It’s in /Applications, no extra categories or locations specified.
After removing pictures, music, movies it at least doesn’t crash. But that’s not the intended use, is it?
Maybe it’s just busy with creating some first index? then a message would be appreciated.

Yes, of course DEVONsphere is indexing what has been set in the preferences. And unless this is a brand new machine with very little on it, that can take some time.

That being said, you likely didn’t give it Full Disk Access in System Settings > Privacy & Security. Make sure you do.