where do i find the folder and the reg file??
Look slightly more carefully at iMeowBot's first reply.
I had a very loosely related problem that I think I just figured out. I moved PSE3 from my iBook to my iMac. It wouldn't register for me -- it kept popping up the nag box, but when I said I wanted to register online right then, it didn't do anything and just went into the program. This was fine, except the same thing would happen the next time I ran it. It turned out that for some reason it was not able to launch the website in Firefox for me in my managed account, but it could when I did it as admin.
Of course, then, after asking me to give it my Adobe user name and password, it prompted me to select a new user name and password and then refused to register because someone else (i.e. me under the previous username) already registered it. Retards.
But at least, now, I don't seem to get the warning anymore.