Update Portrait Professional 12 to iMac Catalina 10.15.7

I update my iMac late 2013 to Catalina 10.15.7 and I have already bought Portrait Professional 12. I need to update Portrait Professional 12 to the latest version that will run on Catalina 10.15.7. When I try to open it gives me a message portraitpro.app needs to be updated, contact developer. I have go to security and entered password but where do I go from there? I updated Aperture and worked fine.