Default [Q] HELP with updating HTC One to 4.4...

Hello, I have a rooted international HTC One currently running 4.3 Android with Sense 5.0. I am trying to perform an OTA system update that I have received... I downloaded the new 4.4 Android (1.1 GB) and I have selected "Install Update". But when the phone restarts, it just enters recovery and opens TWRP by itself!
So then I try to flash the downloaded OTA file via TWRP, but that also fails... Does anyone know how I can get 4.4 on my HTC One? Thank you