Unfortunately there is no license dialog if you try to upgrade from Pro to AIS. The Pro dialog shown previously comes up immediately. If you double click on the license, it just asks if you would like to insert the license in Pro and does that if you say yes, even though the license is already installed. The AIS installer simply won't run with Pro installed-you can only upgrade Pro, or uninstall and try again. Tried it the other way when I had AIS installed, though. Ran the Pro Installer, and ended up with the picture attached: Pro with nonfunctional Firewall tabs. Current installer is just not very flexible.