Keyboard port settings and port scan are in the kladenets23.c file in the functions Ports_Init() and Keyboard_Scan(), can customize the scan of any keyboard with any matrix.
The old version of the LUFA library is used, because the new one for some reason does not work in the controllers I have (Microsin162).
Compile to .hex file:
$ make
Press the button on the controller and run the command:
$ make dfu