How can I restore Programs and Midi map to their initial state in VB3m?

With a mobile App, you can delete its memory and cache. Just go to the settings of your mobile device, locate the settings related to the Apps, locate the App and find the option where you can reset the memory used by the App. With VB3m, and pretty much with any other mobile App, this will delete all files that have been created by the App in its own "sandbox", thus resetting everything to the state it was when the App was installed the first time.