You can delete your map at any time. When you do delete your maps, the map is deleted immediately from all our servers. If you are using the free version of BatchGeo simply use the edit link emailed to you after creating your map. If you do not have the map email, go to the login screen and just click Forgot Password. Once on the edit screen for your map, there will be a large red "Delete" button at the bottom of the screen.
If you are using BatchGeo Pro you can access the edit screen for any of your maps by accessing "My Maps" from the Account Admin menu.