Yes, basically those tabs were all different artist tabs I had designated for each one, just like with other audio/music player software. The tab text titles always only say "Music Explorer", but they're different artists I had selected. Not long after, the bug makes them all globally become only one particular artist tab. In those screenshots it happened to be all of the tabs became the artist/band "The Freeze", which initially was only 1 open tab out of the 12. The tab named "Hard Rock mix" stayed the same, because it's a PLAYLIST tab I created, and not just a tab of a selected music explorer artist. The PLAYLISTS are the only tabs that remain the same and don't change from the bug.
I just replaced the old files with the patch version files you linked. MusicBee has had this bug going on through multiple software updates, going as far back as who knows when. So, I don't know how the bug could have been addressed and fixed, since this is the first time y'all have heard about it. I'll do the same experiment and wait to see if all my tabs become only one artist.
I'll let you know soon what happens.
Thanks, Steven!
J