Ye Olde Napster WMA DRM Licence

[Solar Nexus]

I have old tracks that I bought from Napster many years ago, before it merged with Rhapsody. I can't convert them or even play them because of the DRM on them all. I read that I could play them on Winamp, but would need to acquire a licence. The idea here is that if I can play them on Winamp with a licence that I can convert them into WAV files that I can then convert into MP3's. Any help would be appreciated please. Thanks