Installing additional desktop environments
To add/change desktop environments, you need to go to the PC-BSD Control Panel -> System Manager -> System Packages. This lets you add/remove different system packages (such as KDE, XFCE, Qt development, etc..) without having to re-install PC-BSD.
The AppCafe is just for installing/removing PBI's. We tried to make a clear distinction between PBI installations and system package changes in 9.0, so that people can be clear whether the application is stand-alone or integrated into the base system.
~ Ken Moore ~