It is somewhere on the download page: You can play the demo flights, you can access every menu item you can load and watch every model and here you can use the arrow keys to go to and scroll around the models, but there is no way you can fly and controll the models, not by keyboard, mouse or joystick. You can even download other models from the homepage and other demo flights. Use the ff and rw keys to run the demo flight faster or in slow motion until picture by picture.

We use the Demo to let the user install the program once in order to varify his PC system. If the demo installs and runs, the full version installs and runs as well.

Cheers - wolfgang