SimpleProgram (cool handle), if you do not have any of the old versions available to download, there is a solution.
Use the 1074 installer and don't let it start the IDE when done.
Then, find userdetails.ini file under AGK\IDE\Editor.
Edit it with any plain text editor and set the SERIALCODE to the one listed on the serial codes page reached from Your Products.
Save the file.
Then click on the desktop link for AppGameKit and you are in business.
LeeBamber, a TGC developer, provided this solution.
Cheers,
Ancient Lady