Cannot convert pdf files

Hello I bought Pdf Architect professional in July last year and cannot convert pdf files. I get sent to a window asking me to buy the product. How can I activate my purchase which has so far been useless?

Hi,

if you haven't done so yet, you will need to activate PDF Architect.
If you already activated PDF Architect but are still facing the issue or have any questions regarding the activation process or general usage, please contact the PDF Architect support here

Best regards

Robin