Hello,
Not long ago I rooted my HTC One M7 which didnt really work as the root file was the wrong version, however my phone still has the TWRP custom recovery on it.
I have been looking to un-root my phone as i don't really want to have to deal with the hassle of manual updates, so I have an idea of how to do it but im not sure whether the RUU file has to be the same version as what the phone should be running, or could I just grab the Kit Kat RUU and install that one.
Maybe someone could shed some light on it, thanks in advance and sorry for the massive post.