File list (Check if you may need any files):
matrixkeyboard\44keyboard
..............\44keyboard.hex
..............\44keyboard.lnp
..............\44keyboard.M51
..............\44keyboard.Opt
..............\44keyboard.plg
..............\44keyboard.Uv2
..............\44keyboard_Uv2.Bak
..............\4X4 KeyBoard (2).PWI
..............\4X4 KeyBoard.DSN
..............\4X4 KeyBoard.PWI
..............\c44key.c
..............\c44key.LST
..............\c44key.OBJ
..............\Last Loaded 4X4 KeyBoard (2).DBK
matrixkeyboard