How to restore form to one of its previous versions

All of my hard work disappeared!!!

I had my form almost perfect, with a zillion conditionals, etc. I tested it several times, saving it all along, and then clicked Support to find out something extra to add. When I used my browser's back button, it reverted to a version that I had saved days ago. Is there anyway you can recover the form with all of the conditionals and everything (they are a real pain to enter, by the way)? 

So very very very upset to lose about 3 hours of work! You need to fix your software! The form _was_ https://form.jotform.com/60456902564963.

There is a Revision History tool available at JotForm which can be used to restore the forms to their previous versions.

How to View Form Revision History

Please give it a try and let us know if you need any further assistance.

Very glad to have that option, and it did show me my work. I clicked on the
version I wanted, and it has the green check box saying "current version".
However, when I then go to "edit form", it is the ancient version, so I
can't actually get to the revision I wanted to make it the form. A little
confused.
...

I just realized something. The last revision yesterday was adding a page
break. I looked at the ancient version of the form after I chose this
revision and saw that a page break was added to it. Do I have to choose all
of the revisions (hundreds) individually?
...

You should be able to restore to a specific version.  When I checked your revision history, there were quite a few restore points, including when you made the most changes:

Is one of these not the correct version of the form you are looking for?