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 still send the existing uploaded submission files in your jotform by re-submitting the form after integrating the form to Dropbox.
You can re-submit the form again in the View Submissions page of the form.
user guide: -How-to-view-Submissions
Click on the EDIT button and then click Submit button.
You will have to do this for each existing submissions if you want the uploaded file to be copied also to the Dropbox account integrated on the form.
Hope this help. Let us know if you need further assistance.