Hi - I too have recently added this excellent pedal to my board. Can't see how to turn off the auto save, it's definitely an option on my ZoomB1 but I must admit I keep it on there anyway as I like it. You have to overwrite the presets there are no empty slots. But you can download the factory presets if you want to reinstall them the Edit and Share software makes all of this easier. You just sit at your PC and don't end up bending down to mess with the board, you can save and share your created patches with friends or for future reinstall. It's just easier to use than doing it all on the pedal. Not used Looper or drums sorry. Nor do I know of this Cubase, sorry again.
Check this out - the dropbox folder is still active, some good stuff there.