installing twrp

I have my tmobile d801 running lollipop 5.0.2 rooted with twrp installed. Now that ive discovered that there are no roms for lollipop im going to downgrade to original firmware that runs 4.4.2 so i can try out some of the roms that have been developed. Ive found a way to root, though i cannot find a guide to install twrp, all the guides seem to have twrp for a different model of lg g2.

What version of twrp do i need and how can i flash it for the d801?