I just copied this from garwynn a post from a different topic its in the rfd discussion topic so find it and give him a thanks
You'll need to be on stock (unrooted) LJC to do the update.
Also... for now if you want to re-root:
1) Install custom recovery of your choice
2) Flash the following .ZIP:
...and you'll be all set.
I'm hoping to see a full TAR available soon where we can make proper one clicks.
Rockin it from my macknote2