https://imgur.com/ZgOlp9K
And the second screenshot there shows exactly what I was inferring:
This track has no values for
Title, Artist, Album... in fact, no details at all.
Also realise that moving files to a different folder structure and MusicBee no longer displaying these values are two distinct issues.
That MusicBee can play the files means it knows where they are - and that is what the
Relink Music File Paths command is designed to solve.
That is completely unrelated to the fact MusicBee no longer shows the track details. It reads these from the tags within the tracks themselves, which as noted previously are no longer there. The column headings in the Playlist view show precisely which values it is reading from to populate those columns.
Hence...
Compare that to the values if you do the same on your old PC.
There is no reason for these values not to be present on your new PC if they were present on the old one.
They are saved within the music file which you have assured us you copied from one PC to the other.
Since I can't think of any logical reasons, let's consider some less logical ones:
If the details are present on the old computer, are you sure you have copied over the tracks you updated, and haven't accidentally copied say, a backup of these tracks from before you added these details
to them?
If the details are present on the old computer but not the new one, are you able to delete the new ones and copy them over again? This time don't rely on potentially dodgy paid programs that might deliberately make a simple task look more complicated than it is to justify the cost. A simple copy using Windows File Explorer to - and then from - an external USB drive would suffice.
Bee excellent to each other...