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 easily just remove the Paypal tool and add the Paypal Express, the product list can be saved and will automatically be loaded in the new Payment tool.
Here's an example:
1. Click to remove the payment method.
2. Click "Ok".
3. After that, you'll see this window that will ask you to keep the products. Click "Yes".
4. Then add another payment method, in this case I'll add "Paypal Express".
5. The products are now restored.
If you are worried that you'll lose your product list. You can first clone your form and make the changes there. Here's how you can do that: http://www.jotform.com/help/27-How-to-clone-an-existing-form-from-your-account.
Do let us know if you need more assistance on this.