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.
To reset the settings of the current Paypal Payment Tool, you need to open the payment tool's wizard on the "Form Builder". With that way, you can change your Paypal account's credentials, change product details, etc.
However, if you want to reset all of things from the previous version, you can simply delete that Paypal field, then add a fresh one.
For further assistance, please let us know.