Tested with DCS World 1.2/ KA-50
Refer to: http://forums.eagle.ru/showthread.php?p=1515557

Copy the contents of "Thrustmaster Combined.lua" to your own lua file located in the following directory:

C:\Users\*username*\Saved Games\DCS\Config\Input\ka-50\joystick

The file is usually called something like:

Thrustmaster Combined {0F4A3A00-BAE7-11e1-8002-444553540000}.lua