remote functionality reduced under 17.1

i have this remote
http://www.gearbest.com/mice-keyboards/p…tml?wid=21
M3 2.4G Wireless Remote Control Keyboard Air Mouse

it used to work fine under kodi 16, i have recently upgraded to 17.1 and some functions of the remote no longer work such as back button no longer work and i used the keymap addon to change the back but it doesnt appear to do anything.

i have also tried using this

MX3-M Remote FiX-v3.0 (Universal)
http://forum.kodi.tv/showthread.php?tid=203623

but it doesnt appear to fix anything and the files rename after transfering to the kodi keymap folder