Tvheadend

I hope someone can help me as i have been trolling the net for hours trying to find an answer.

I have just got myself an Evoxfinity and some of my channels arent showing so i done an update via tv adapters but it is still the same, the version that is on the Evo is 1.1 and i can't find any way to update to the latest stable release, if someone can point me in the right direction, it would be great.

Thanks in advance