I don't know if someone at ASR knows where I can get a ARC 101 course.
I have found it incredibly useful, especially the parts on microphone placement and adjusting targets. Also it explains the different settings you may have questions about.
My PW Amp has also stopped beeping when I try to toggle ARC on and off. I did not know you can toggle ARC in the software. I will give that a try.
Regarding the PW Link, its major disadvantage to me is it lacks a sub-woofer output.