OK, here's what happened:

1) I visited the WinAmp website and downloaded WinAmp.
2) I realised, after I had opened it, that Windows Media Player was much better, and decided to uninstall it a bit later.
3) I opened Limewire and searched for a song, and now all the files are WinAmp files, and not WMA files like they were before.

Is there any way I can change this?

Btw, I have now uninstalled WinAmp and it's still doing it.

~Delta~