I lost my root access on my LG G2 D802 after updating from 4.2 to the latest kitkat 4.4.2 and I have tried to find a way on how to gain root access once again on my phone. After a while I finally found a way on how to root my phone.
Download and instructions found HERE
Once you followed the instructions as given in XDA, you may check your root by downloading Root Checker at the Play Store
Happy Rooting!