Can't get ring doorbell 2 off mounting bracket

After talking with RING CSR, it seemed (TO ME ANYWAY) the lady did’t really know how to get the back off. Finally the after being put on hold for awhile, she said pry it off from the bottom of the RING camera.

I broke a few fingernails but obtained a very small opening. Next, BE CAREFULL DOING THIS, my wife gently pushed my letter opener, which widened the opening. Then, I had a little give in the cover and I reefed/ pulled on the cover, seperating it from the actual RING Doorbell Camera. It finally came off. I guess I was being to gentle, thinking it woud break everything.