Rooting from Towelroot

Hi, I've been using Towelroot for a long time, and thought that it's time to upgrade to Lollipop. Is there a step by step guide for how to do this? I can only find guides on rooting on stock lollipop, and not this type of specific transition.

My specs:
Model No.: SM-G900F
Android Ver: 4.4.2
Baseband Ver: G900FXXU1ANCE
Kernel Ver: 3.4.0-1186806
dpi@SWDD5919 #1
Mon Mar 31 19:57:36 KST 2014
Build No: KOT49H.G900FXXU1ANCF