Let me just repeat what is written on the Reflex website when you ordered the demo. I hope it helps finding the right answer.
"This Demo shows the product features and display quality of the Reflex XTR model flight simulator. Before installing this demo, please make sure that DirectX 8.1 or later and the latest set of video card drivers are installed. You may find suitable drivers at
www.ati.com or
www.nvidia.com. Please install these drivers EXACTLY as written in the instructions provided by the manufacturers. To verify your curent driver situation please click to START - RUN - typ DXDIAG and press ENTER. Check DISPLAY and you will find the driver date on the right side. Anything older than Oct 2003 should be replaced.
This demo will let you check the sceneries, the models, the menues, the parameters and you can run the prerecorded flights.
For obvious reasons you are unable to control the model by keyboard, mouse or any kind of interface or joystick. The full version for the Reflex XTR model flight simulator comes with a USB interface to use your own radio."