Batch converter should be able to open all files from a 'tree' inside a folder.

When batch converter is openeed and you have, lets say a folder called C:\Music. If you have your actual music files organized neatly inside the folders, like
C:\Music\Rock\Band Name\Songname.mp3, the batch converter can't recognize it for some reason.
Make it better by opening all of the audio files in that specific tree.