JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Thanks for contacting us.
I think you can just update the form and if you need the added field in your Constant Contact, you can re-integrate it to the form. For more information about Constant Contact integration, you can check this article: JotForm Now Integrates with Constant Contact.
Do let us know if you need further assistance.