I have flashed TWRP 2.8.1.0 (latest version)
I am S-ON
I tried to unroot my phone and firewater told me that my kernel contains anti-firewater files.
so i decieded to flash ARHD, while flashing, I wiped my phone and after that I couldnt flash any ROMs. ( ARHD and a ROM that HTC has sent for me)
I want to flash HTC sense rom and return to stock.
thanks
use twrp 2.6.3.3 to flash arhd. then after you achieved s-off you can return to stock with a ruu or with the stock odexed rom available on arhd website.