What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
You can resend the email by editing the submission, it is not necessary to make any change, simply going to the submissions page, editing it and clicking on the submit button will trigger the email again.
Here's a guide that will help you with editing submissions: https://www.jotform.com/help/325-How-to-Edit-Submissions-Made-on-Your-Forms
Also, make sure to have enabled the option to send the emails when the submission is edited, this is checked on the emails wizard:
Hope this helps.