3D FlipBook - I have purchased and installed the paid version of this WP FlipBook plugin, however, when we create flipbooks, the URL links

I have purchased and installed the paid version of this WP FlipBook plugin, however, when we create flipbooks, the URL links from within the PDF pages are not coming through on the FlipBook version.

How do we get this to work? That was one of the main reasons we went with your plugin.

Thanks