I have had mixed results renaming files.
Sometimes, I can rename them is a graphics
program. Back in LimeWire they show up in red,
I hit Refresh and everything is okay.
The Windows Explorer sometimes changes
the name and then it is not available to be played
in LimeWire.
Today I just highlighted the file name, hit rename
and it renamed the file which played. Unfortunately
it left a "ghost file" (zero size) with the old name
that would not delete, ie "may be used elsewhere".
A mite "glitchey", I'd say.
Best Wishes!!