=How_to_change_the_IR_for_Mbox.pdf
To load and test after the modifications: remotecfg /storage/.config/remote.conf
Click any button and run dmesg -c in command line.
You will get similar output
[ 3314.012466@2] remote: release ircode = 0x18,
[ 3314.012478@2] remote: scancode = 0x0073, maptable = 0,code:0x00000000
You need to map 0x18 to the correct value from the pdf.
In my case is the volume button 0x18 115.
Make the modifications and run remotecfg /storage/.config/remote.conf.
After the correct mapping the remote should work correctly.