OK maybe i haven't define correct demo term. I was trying to say what you have said. I installed PDF Architect 5.
Notwithstanding the foregoing, I've discovered that all problems with crashing, it's due because gpu acceleration is activated in "graphics options" PDF architect menu . If i desactivate this option all PDFs are opened correctly.
I've updated the drivers of my graphical card to last published (NVIDIA) and problem persist. This situation didn't happen before w10 major update (Creator's Update). By the moment i'll keep this option non activated
Maybe an update could fix it?
Thx for all your support