Here is the XBMC version which built in the 104k4, in case some guy need it:
http://www.mediafire.com/download/tdu4jos4ln8bdfk/xbmc-for-tronsmart_vega_s89_20140513.apk
Compare with the OLD XBMC version,it added 4K and RMVB support, now it don’t need to call external mx player to play 4K and RMVB video, can do that with internal player.
also it don’t have the A/V sync problem.
You can try this on your device, if you have any questions, feel free to contact me.
Eric
Geekbuying