[Zubersoft]

This is a fundamental difference between Android and Windows - if I try to delete a folder on Windows with files still in it, it will just go ahead and do it, while Android will not. Unfortunately, I didn't handle this properly on Windows, so I will be adding a fix for this immediately. It sounds to me like you changed the storage settings though. I'm assuming you turned off "Create Subdirectory per Song", correct? Otherwise you wouldn't have encountered a problem with this, as MobileSheets would have only been deleting the song subdirectory.