Commented Code Lost from Free Form Script Editor

Commented Code Lost from Free Form Script Editor

I have lost about 70% of the code for one of my forms. EmailToLeadForm.  The code I lost was in the ZC_Content.On User Input.  There is only 85 lines of code and there should be about 200+.

Are you able to revert to the previous version so I dont have to spend hours rewriting the code