You're ready to convert your MP3 and other audio files...but where are they?
You can go to the Window's Start button, followed by "Find", followed by "Files or Folders". Type "*.MP3" without the quotes and make sure "My Computer" is selected in the "Look In" control. Then press the "Find Now..." button. This will take awhile and scan your hard drive for all your mp3s. Then you just have to right click on the ones you want to convert!
To find other audio file types, search for "*.WAV", or "*.WMA"