Thanks for your support. The demo and full version uses the exact same input method. Check if you can think of something that has changed on your setup.
If more than one controller/input device is connected at the same time that might cause a conflict.
If connecting via USB, make sure you uninstall vJoy and Smartpropoplus if you have them. Their driver messes with things when connecting via USB.
If you provide more info on what operating system/controller you are using someone might be able to help.