extension loss

[testacon]

Is there a way to re-associate a .mp3 back to Windows Media Player? I installed a program and it hi-jacked the .mp3 extension and after I uninstalled it the icon is the blank window one that doesn't open properly.

I know that I can probably use PHM editor and add the .mp3 back to the Windows Media Player key but I thought that there should be a better way to do this.

Any suggestions?

Thanks!