Help, Im not able to edit and open my prezi!

Hi,

Im not able to open my prezi for editing, and I cant watch it as well (IO_ERROR). Unfortunatley I closed the browser without saving before this problem.
http://prezi.com/o3ael5f21k4p
I have to make a prezentation soon with this prezi. Please help me!

Thank you in Advance,
Balázs