I had the same problem. Still not resolved. In fact, I was looking on forum, to find a solution, but still nothing. The authors take a look here any time?
Same error here.
When trying to update the software, it pops the error regarding the sign. We tried to uninstall the software, with no luck. Also force the installation over the app but same...
Let's hope it gets fixed soon
@ChristianBlenk hatte das selbe Problem. PDF Forge hat ein Removal Tool womit die Deinstallation ohne Probleme möglich ist. Danach kann die neuste Version normal installiert werden. Einfach zum Punkt Fehlerbehebung runter scrollen. (Da ich keinen Link Posten darf, einfach folgendes Googln: Wie-kann-ich-PDF-Architect-deinstallieren)