OK, now things are where they should be as far as the basic volume level of the ARC solution.
First of all, please do write up your experience with using ARC 3.0.2 on Windows 8 vs. Windows 7 and email that to Anthem Tech Support. They may need details on your Windows 8 configuration -- such as which computer model, whether Windows 8 came bundled with the computer or was installed by you, and whether or not you PREVIOUSLY had a Beta Windows 8 version on there before your current version.
As for the ARC solution itself, what you've got right now looks very good.
I would recommend that you NOT fiddle with the cutoff/crossover values. You mentioned before that you wanted to raise them to 80 to allow your sub to handle more of the bass, but in this case I think ARC is relying on the slightly lower values to build a better solution. So I suggest you leave them where they are.
If you know your subwoofer has its own, internal protection against the very lowest bass frequencies (below 20Hz), your chart suggests your Sub is a good candidate for use of the Flat option in the Advanced portion of Targets. To try that, just make the change in Targets, accept that change (which will also dismiss the Targets window), re-Calculate and re-Upload. No need to re-Measure.
You've got a bit of a drop off at the highest frequencies which may simply be a matter of mic sensitivity. Right now, ARC is set to do correction only up to the default limit of 5KHz (the Max EQ Frequency setting in Targets), and for now I suggest you leave it there and do some listening -- perhaps with the change to Flat.
While you are doing that, consider the physical pointing of your speakers, as all speakers are more directional at the highest frequencies. If your speakers are not mounted at seated ear height then pay particular attention to their vertical pointing. For LF/RF, you do NOT want them pointing directly at ARC mic position #1. The usual Rule of Thumb is to toe them in only 1/3 of that amount. That is if you consider the angle between pointing straight to the back of the room and pointing directly towards ARC mic position #1, you only want to rotate them 1/3 of that angle. If you end up repointing any of them you should re-Measure for ARC.
As things stand now, you could, I believe experiment with extending ARC 's correction up another octave or a bit more. I.e., Max EQ Frequency of 10KHz or perhaps 12KHz. As with Flat, you can experiment with that by just doing a re-Calculate and a re-Upload. No need to re-Measure unless you shift speakers physically, which changes what ARC recorded during Measurement. Note that telling ARC it can apply correction resources up there will divert them from corrections needed lower down. So when you raise Max EQ Frequency, one of the things you should check is whether the green Calculated curves for any of the speakers start looking worse at lower frequencies. If so, back off Max EQ Frequency. The cleaner solution lower down is more important.
Also keep in mind that the positioning of the ARC mic is crucial for best Measurement of treble frequencies. The mic needs to be pointing straight up at each location. The tip of the mic should be set at seated ear height -- if you recline seats while listening then figure ear height for the reclined position. And keep the mic tip away from blocking or reflecting surfaces like seat backs. It is better to raise the mic tip a few inches to clear a seat back, or shift its position perhaps a foot closer to the screen. The mic is omnidirectional, so it hears audio from the entire hemisphere (all directions around) above the tip.
Again, you are into TWEAKING right now. The solution you ALREADY HAVE should sound excellent as is. Tweaking it a bit like this MIGHT make an improvement. Trust your ears. What you hear is more important than what you see in the charts.
NOTE: The Anthem can only store one ARC solution at a time. So if you want to compare two different solutions you have to pause to re-Upload them in turn. HOWEVER, if all of your changes are just in Targets, then you can use the Movie and Music solutions for comparison. I.e., leave Movie as your baseline solution and make your tweak experiments in Music. Then set up two Sources in the Anthem which are identical except one uses Movie and the other uses Music. Set that way, you can easily A/B compare the two sets of Targets choices. "Movie" and "Music" are just names of convenience. They could have been named Fred and Ethel. They are treated IDENTICALLY in terms of how ARC builds the solution for each and how the Anthem applies those two solutions during listening.