www.hairersoft.com

That solved it, although it doesn't explain why it doesn't work with the App Store version. Thanks for the quick response and solution.

I just upgraded to the latest version of Amadeus Pro from the MacAppStore on my MacBook Pro. I tried to run Izotope Ozone 8 (as well as other Izotope plug-ins), which is registered and works perfectly as an Audio Unit in all of my other software on this computer, and I am asked to register the progr...