Finding licences

[Bug-Eyed Earl]

I just downloaded more songs off of emule last night than I have in 6 months. Today I get a message saying I have licenced content and I was asked if I wanted to back up the licences.

I remember once I downloaded a song off of a website that was licenced, andquit playing after a certain time had passed.

I'm pretty sure I downloaded another such song, and I want to get rid of it now to save me the trouble later, but how do I find out which one?

Or is it something else?

Any help is greatly appreciated.