Bumping this thread vs start another. I wanted to try some of those manual tweaks Gene recommends for 2ch and Arc via his vid (1) but ARC genesis (v1.11.3) will not allow me to open saved ARC files to do any manual adjustments. Any advice why that would be? I'm using STR integrated as 2ch and it will not open any ARC file I have saved. Using "open saved ARC files" from menu or "open" no love.
What is "vid"?
I don't have the STR so I can only confirm that it works fine in my AVM70. As to his tweaks, he did a good job obviously, we are talking about Gene.

Tweaking ARC G, in my experience, you have to use REW (and Gene did that), and in my setup I have to spend hours, as it is really trial and error. Gene said it's better than Audyssey in terms of accuracy target vs actual but I found the opposite true, that is is a worse than Audyssey and a lot worse than Dirac Live. So, I have to suspect this is very set up dependent (ie room, speaker, placements, subwoofer integration etc.
I got much better corrected response curve than his (the specific one shown in his) using Audyssey or Dirac, with ARC G, no matter how hard I tweak, the best I could achieve was no better than Gene's in that video, may be even a little worse, so, good luck to your upcoming tweaks. Please share your REW curves.