If you wish to start your Mezzmo library again with a clean, empty Mezzmo database, then go to the Options dialog (General page).
To reset your Mezzmo database, click the Reset Mezzmo Database button.
This will remove your existing Mezzmo database and create a clean, empty Mezzmo library with the default set of playlists. Once reset, you can start adding files, folders and playlists into Mezzmo again.
Resetting your Mezzmo database will delete your current Mezzmo database files and this deleted information cannot be recovered.