Dennis @ PerfectForms
Once your account has been switched to HTML all forms will open in HTML once published. I suggest doing a “Save As” and fully testing your form in HTML, then making all of the requisite changes in your production form. Pay attention to the behaviors and logic. Flash is a lot more forgiving of errors than HTML. When I have audited forms of customers reporting problems after switching to HTML I typically find flaws in behaviors and/or logic. If you are running into problems please make sure to do a full audit of all of your behaviors.