Clarification please...
You originally had the plus sign (+) as the first character of the file name?
Or as the first character in a tag?
Or anywhere in a tag?
And while the tag remained unchanged you woke up one morning and the file name was changed to have a plus sign as the first character?
And nothing else was changed?
If the plus sign was in a tag, please show us a screenshot from the Tag Editor showing a tag with the plus sign.
<Shaking head as this really doesn't make any sense. Nor does it seem possible.)
I agree, it was so random and out of left field after many years of no problems whatsoever.
The only interaction since adding the last album to Musicbee on February 1 (no error then) was updating to Version 3.6.9143, as I update periodically, but nothing else. And I remembered when I updated I restarted the app and verified no messages popped up or anything out of the ordinary and then closed out. Not sure what specific date I updated though. The issue appears to have show up on March 6.
The + was anywhere in the filename... artist title, album name, or song name.
+44 was moved to 144 (the only one to not replace + with a single space and instead a 1, also the only one with the + at the beginning of the name that I can find, so might be something there)... and the rest (albums and song names) had the + changed to a single space. All shown in the example pics I attached before.
So to recap: I added an album on February 1, the changes according to my daily backups apparently happened on March 6, I updated sometime after February 1 (not sure on timeframe), then on March 22 when opening the app it told me there were a bunch of missing files and I noticed quickly that all of them involved the symbol of "+", which prompted the question because it was really odd.
This is what has always been in Musicbee for years now:
https://drive.google.com/file/d/1FubBnIZiGmc_j3uC_G_r-fqPNT_Mhujr/view?usp=sharingOpened it up to see that included as a missing file and found it now under 144 instead of +44. Changing it back fixed the link.