Hi - I'm a noobie just getting started but I'm running adb from Debian 8 (Linux.)
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I got it. I installed the apks/{su.apk,tr.apk} files and TWRP.img from L41C-Advanced-Recovery-Tools.zip, Flashify from Google Play and I was able to install G3-ROM-Port-2.3.zip.
Very nice. It corrected a number of problems but still have a couple of lingering problems plus a random reboot - which was there before I started. But now I have root access - I can poke around - learn a little about the Android.