Calibre (not responding) on Mac Mini

Hi all.

I've been having the same problem with the last 4 or 5 updates to calibre. I am running Sonoma 14.6.1 with Calibre 7.18.

I start calibre but then in the Force Quit Applications panel, the error "not responding" appears. So I force quit calibre and I then have to relaunch the finder and then calibre again to get calibre to open. However, sometimes I do this 4 or 5 times and it still doesn't work.

Sometimes I have to log out and log back in again and calibre opens.

Can someone please tell me what's wrong?

Cheers.