I could suggest to make your own copy of the keybinding.
I think the file is located in
\Renegade X\UDKGame\Config\DefaultInput.ini
Please correct me if i am wrong.
How did you get that version? Just download the launcher and open it. The game will download the latest version and you can use it to launch the game and connect to server.
https://totemarts.games/forums/files/file/1-renegade-x/