Been trying to root on 4.4 for the past two hours but unfortunately i'm getting the "The process cannot access the file because it is being used by another process" error on all 3 telnet steps.
EDIT: I'm now stuck on 4.2.2 I've tried selecting "6. revert Moto X to 4.4" but after the warning screen it just goes back to the main menu. I've tried using system update 3 time and it failed every time, I did a factory reset and tried twice more, redownloading all of the files and trying again but if that doesn't work I have no clue where to go from there.
EDIT2: I'm going through the steps manually and so far it seems to be going well.
EDIT3: doing it all manually worked but was a pain in the ass. Hopefully 640k can find a solution for the telnet stuff.