When you add a folder into Mezzmo using the Add Folder... menu item, you are creating a folder playlist and it is a direct representation of the folder & sub-folders on your hard disk. If you add or remove a file from the folder on your hard disk, then the folder playlist in Mezzmo will also be dynamically updated as well. So, it's a one-to-one representation of your hard disk folder & is fully dynamic. This is really convenient if you want to use your existing Windows folders as your primary hierarchy/organization of your media files (instead of re-organizing them in Mezzmo).

Since folder playlists are dynamic & a direct representation of folders on your hard disk, you cannot edit the contents of a folder playlist. If you do want to edit the contents of your playlists, then I'd suggest you add the files into Mezzmo differently. For example, you can use the Scan Drive/Folder For Media Files menu item to add files into Mezzmo. Choose the folder you wish to scan, and then select the Add files to playlist checkbox and also check the Create sub-playlists based on folder hierarchy of files checkbox. This will add all the files into Mezzmo and create normal playlists for any sub-folders that it finds. These playlists can be edited as you like - you can add or remove files, move them, remove them, etc.

Hope that helps you do what you want in Mezzmo. Mezzmo has a very flexible organizing system, so I am sure you will be able to do what you want. If you have further questions, just ask.

Best regards,

Paul