Once you register the serial on the card in the box, you will see ARC X in your IK Product Manager. Have you installed the IK Product Manager and checked there?
That is your User Area on the IK web site. That is a banner for the IK Product Manager which you need to download an install. It is an app you run on your computer, not in a browser.
I see the confusion, though, and it has been noted We’re moving to a new web site/platform in the near future so that shouldn’t be an issue or confuse anybody soon enough at least.