There is only one file type that uses the .XPADDERCONTROLLER extension:
Xpadder Controller Profile
Profile of a controller or joystick used by Xpadder, a keyboard and mouse emulation program; contains layout information for a controller and defines how the buttons and movements are mapped to a keyboard and mouse.
Xpadder allows players to use a gamepad or joystick to play games that do not offer controller support.
Updated: July 17, 2009