Before Purchasing queries

Hello,

Before I buy the component, i have a few questions. I am working on a site where client would like to have a payment form builder, I saw the demo of Payment Form, which was only for Course registration and have the form fields only for a course, But my required would be very different form this fields, My form fields would be for a membership. So can I have the form fields of my choice?
And also can I save the form fields into database so that I can export it into excel or csv format.

Thanks,
Piyush

Please help me , why the below error is coming in your demo.

Fatal error: Call to a member function setQuery() on a non-object in /home2/extfoujo/public_html/demo/pmform/components/com_pmform/views/complete/view.html.php on line 28