This software is awesome and has saved so much of my time. Thank you, developers!
I believe I installed beets back at version 1.3.19 on Fedora 24 with Python 2.7. My library DB is 'musiclibrary.blb'. Some time back near the end of May I upgraded to 1.4.3 (currently running 1.4.5) but ever since going to 1.4.x I cannot run beets, it hangs after loading plugins (none configured) right when it should be loading the DB. I see that if I remove the config file, beets creates a 'library.db'. Also, if I use this new empty DB, beets runs fine.
Did the DB format change at some point? I've tried restoring backups and same behavior...