I am having the same issue running a new MAC with the Catalina system. I remember that when I loaded Flash it said that Flash would be turned on as needed by a website. That makes me wonder...since Catalina decides when to turn it on and refers to websites, has it been associated solely with Safari and not actual programs?? I also had the developer message when I tried to run Corel Painter 2016.I am running Poser Pro 2014. I too am looking forward to using my new Mac. A short render I did with the basic figure was super fast. I think this may be one for the developer to figure out a better handshake.