Help with lost Prezi

I was performing a live Prezi creation workshop at a conference yesterday, and after completing I then saved it. After then running another workshop on another copy of the Prezi, I then went back to the previous Prezi to review. It asked if I wanted to restore from Prezi.com 1min ago or on the desktop 15 mins. Naturally I used the 1min, and it reverted back to my previous version before the workshop. Nightmare...

Is there any way i can recover the other version? I have a Pro account and was running a sync via Prezi,com rather than on the desktop.

Here's the link :

https://prezi.com/scgqy51apwmr/

Kind regards,

P