As you have suggested I am posting in the forums.
I recently updated to a Macbook Pro retina, OS X 10.8.3.
I installed Aperture Inspector 1.2, but when I ran it, it stopped at the opening screen image of the magnifying glass. Nothing else happened. From the forum I learnt that there was a new version, so I deleted the old version, and all associated files, and installed version 1.5. I did everything posted on the forum, updating adobe air, deleting various files etc., and it is still freezing at the welcome screen. As you verified, I don't have a MacCreate serial number, but at the moment, I can't even get to the point where I can enter the serial number.
Hopefully this is something simple that I'm doing wrong, as it's a great piece of software and I'm missing it already,