Is there a way to 'undo' changes to Jot Form 4.0?

We used to be able to 'undo' a change if we wanted to, but I don't see how to do this with the new version of JotForm

When a you edit your form, there is a undo icon:

You can also revert changes through the revision history tool: https://www.jotform.com/help/294-How-to-view-form-revision-history 

Let us know if you need more help, we will be glad to assist you.