How to remove PDFTRON watermark on documents

When i generate pdf files it will parse the pdf with PDFTRON watermark in a document.
How can i remove that watermark?
Is it possible?

What is the difference between free user and paid users?
How can i become paid user?

Welcome to PDFTron.

The watermark is part of the demo/trial, and once you purchase a license, it will no longer be there.

How can i become paid user?

Please fill in this form:

What are the features provided by pdftron when we purchase a license?

That depends on what you license exactly, but you can see the options here (scroll down to “Packages”).