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.
Please take note that "Import Form > clone existing form" tool is for cloning a form inside your account or inside the MyForms. I can see that you don't have forms on your account yet which is why you can't get the "Please Select" option.
If you want to upload or import a Fillable PDF Form to JotForm then please go to this webpage: https://www.jotform.com/adobe-formscentral-alternative/
Click the "Import Forms" button. After that, choose the "PDF only" and then upload your fillable PDF form. You will received an email once the form is ready.
Hope this helps. Thank you.
I created a separate thread for your issue so that we can assist you properly. Here's the URL of the new thread: http://www.jotform.com/answers/669231.
Thank you for understanding.