how to upgrade my radio head unit to latest mcu version ?

i have unit MCU MTCB - KGL4 - V2.08 OCT 24 2014 16:48:56 MODEL S07
android version 4.4.4-10122014
kernel version 3.0.36+
root # ubuntu #262
build no. rk 3066 -eng 4.4.4 10122014 .11:36 :22
how to upgrade my radio head unit to latest mcu version ?
thanks

from xda-developers http://ift.tt/1ZTwKbU
via IFTTT