Thank you Chris!
I did manage to update the software, I feel rather smug about it.
But I was afraid dealing with ARC Genesis. The MRX520 was set up by the dealer using a PC. I only have Macs. Also, the router is in a different room and I don't have an ethernet cable long enough. Can I connect the ethernet straight to my Mac?
Thanks, you were very helpful!
Great question - with ARC Genesis, you can actually use Mac Computers - couldn't with ARC2. I'd recommend a WIFI extender and run a short ethernet to the Receiver from it if you don't have or want to get a long ethernet cable. Running the ethernet cable from your computer to the Receiver will not work. That does work with our STR Pre and Integrated, but not with the AVR's. Having the receiver hooked up on your network will also allow you to use our Control App where you can run/operate the receiver with your phone - I assume you have an iPhone - here's the link for that:
https://apps.apple.com/us/app/anthem-remote/id1132341848