PDF Architect 7 Free - Update Version Pop up

I have installed the PDF Architect 7 Free version, and since last week start receiving a pop up every time I opened the application saying " There is a new updated version available to download". On the bottom of the pop up there are 2 buttons: Download and Stay updated with the news (or something like that). Nothing happens when I pressed the bottoms, and the pop up continues there. It is annoying!
Anybody can help please?