Yep, this is the version for you.If your method doesnt work, look below is the video instr for the toothpick method. Thats also your failsafe in case the box doesnt boot on the new firmware...
M8S Smart TV Box - Firmware Update Tutorial - Full Root Access! - YouTube
Thanks a lot! After trying for quite a few times, I've concluded that my box does not have recovery mode. This is real as you can check other people findings here: OTT M8S won't enter recovery mode?? - FreakTab.com Damn it!
EDIT: Just as an update, I did manage to re-install the one available from Latest M8S Firmware Download - EntertainmentBox which was the origianal one. Anything else seems to be impossible....