Help! Prezi glitched and now cannot be edited.

I'm about 5 hours into a prezi I need for class on Monday. I was trying to center some text and resize a rectangular frame. The frame went way off screen and then disappeared. Now the home screen shows only the colored background and the home frame is a small blip. This was not the case until this happened. I've made a copy of it and and trying the shift-click trick and it won't even let me select anything.

PLEASE tell me there is hope and I don't have to start from scratch.

I made a copy to experiment with. Link below:

http://prezi.com/0ul2i5g7ay2p/?utm_ca...

Many thanks in advance!