I understand that, Matt. But going back to my example:
D:\Music\#Collection\Van Morrison\Astral Weeks\Track A.mp3
D:\Music\#Collection\Van Morrison\Tupelo Honey\Track B.mp3
I know I can select a group of individual MP3s, then right-click and use the tool you suggest. But... in doing so, I discovered I had to first select all of the files from the Astral Weeks album, change their entire filepath by pointing to the location on my server, then repeat the entire process for each set of MP3s for each album by that artist. This is tedious, as I have a lot of filepath editing to do (and not just for van Morrison).
What I'm looking for is an expedient way to find all occurrences of D: in all of my MC playlists and change it to U:. That would have been a breeze in, say, M$ Word. In fact, as a trial I have exported a playlist, opened it in Notepad++ and have done just that. Importing the result and having it show up in my Playlists section is another matter. Is there a simple way to do this?
Note: I have also used MC to equalize the volume levels across playlists, so don't want to lose that metadata.