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.
I'm not positive to which files you're referring to, but I'm pretty sure you can not retrieve them. If you deleted the submissions with uploads, you will not be able to retrieve those files. You can only review your email inbox if you have files and submissions there.
If you had something else in mind, please let us know.