When I click on Conditions, the form builder crashes.

The Conditions editor was opening and I accidentally scrolled down, since that point anytime Conditions is open the form editor crashes.  Occurs on duplicated form, but not on other forms.

Thanks for reporting. I was able to reproduce the problem. I'll create a bug ticket about this and inform you here once this is fixed.

I suggest to use the old condition wizard for now so you can access your conditions. To do that, simply append ?old on the URL while on the form builder.

Example:

http://www.jotform.com/?old