[whpalmer4]

Get serious. You expect them to tell you (in a public forum, no less!) how the copy protection on their expensive application works so that you can get rid of every trace, including the one that you can only detect by trying to run the application? If you're really interested in getting rid of every trace, you could restore from your last backup prior to installing the demo.

As for your claim that "Mac apps aren't supposed to do that" someone apparently forgot to inform Apple!