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.
Did you download the encryption key when you enabled the encryption of your form? Encryption key is mandatory to be decrypt the submission.
If you have lost the encryption key, it is not possible to recover it and decrypt the submissions. We would suggest you to disable the encryption of your form so that the new submissions you receive in your form is not encrypted. Can you please check your downloads folder and see if the encryption key is still there.
You may also like to take a look at the following guide : https://www.jotform.com/help/344-What-Are-Encrypted-Forms-and-How-to-Use-Them-as-Expert