Recover an older version

I’m in a disparate pickle. I edited an activity I used last year. The end result was too long so I wanted to make it into 2 activities. Instead of duplicating, I just edited and lost a lot of work that I did save prior. How can I recover that save? I not excited about recreating all that work again. It was about 20 screens. To make matters worse, I need the recovered version by Monday, 7:40 am central time.

[Copy of] Simplify vs Solve High School Version • Activity Builder by Desmos

Email your details to and someone should be able to take care of it. I did the same thing a few weeks ago and they were able to give me a copy before it was edited.