Bottom line: My problem can be solved if there were a way to bulk save/export numerous playlists, whose component tracks have had their filepaths changed.
Context:
A client has 450+ playlists that were built on MediaMonkey on his desktop PC, residing on the C:\ drive.
He has since bought a dedicated media PC. He wants all the playlists to show up correctly in MC 22, on the F:\ drive which is physically connected to his media PC, but is also mapped as F on his desktop PC. All the music files have been COPIED from the C:\ drive to the F:\drive.
I was able to import the playlists on his desktop machine. They pointed to the originals on the C:\ drive. Using "RMC files" I was able to select all the tracks on the playlists and refer them to the F:\ drive copies. Unfortunately, this does not automatically update/resave the playlists. The actual M3U files on the F drive are not modified when one changes the paths of the files indexed in the playlist. So the playlists all playback fine on the desktop with the modified paths, but show up as empty on the media PC.
Exporting each playlist to mpl, one at a time, is not an option, but it does work. If I select all the playlists in one go, the only right-click option is to delete them all. It would be excellent if the option to export them all in bulk were an option too.
Can anyone else think of another way to solve this problem? It's late here, so apologies if it's not been explained clearly.