I downloaded this product - Gnostice PDFtoolkit VCL v3.4.7 for Delphi 6 from its website.
Installed the components and tried its feature.
Like it so much, I bought it from Gnostice (for Delphi 6) after the trial period ends.
But after installing the licensed copy for Delphi 6, i am not able to use it
(see attached image for the error messages).