I created a database. I also set up users to play around with the security. For some reason, I am unable to enter new users or groups (the buttons are all gray). I also for some reason am no longer the admins for the database despite being the owner. I tried changing the ownership to both my user name and admin. Neither works so I can't run the security wizard. Is there a way to clear all the security settings, delete all users except admin (basically restore the database to where it was before)?