https://yabb.jriver.com/interact/index.php/topic,134520.0.html
This was helpful. However, I messed up something in doing it. When I typed in the path, I didn't realize I was only supposed to go as far as the main path. I used your suggestion to try one album first.
The old path: /Volumes/JRiver Music Home/JRiver Music/!Compilations/[Album name]
I put the new path in as /Volumes/FireCuda 1/JRiver Music/!Compilations
At first I thought this worked, so I did all the albums, but then I realized that to do all 34,000 songs at once, I couldn't use the folders, so I did the rest this way:
New path: /Volumes/Fire Cuda 1/JRiver Music
That worked properly. Now the problem is that I have a separate location called !Compilations that I don't know how to get rid of. I tried the name change from the original new path listed above (putting it in the "old path" section in the dialog box) to the correct new path listed the second time, but it didn't help.
In addition, since I don't need the old location anymore, I highlighted that one and clicked delete. Eventually the name disappeared but the icons for a blank location still appear. How do I get rid of those?