Hi there. I have a rooted lg g flex on android 4.2.2 As far as I know, the only way to upgrade to 4.4.2 while maintaining root is using D-Fuses method here
However, it requires that you have cwm or twrp installed, and the only way - as far as I know - to do that is with your freedom flex app. The problem is that now when I install and open your app, it says that it does not support android 4.2.2 So in short. to upgrade to kitkat - I need d-fuse - for which I need crm - for which I need freedomflex - for which I need to already be on 4.4.2 See my trouble? Is ther an older version of the app that works for Jellybean?