Click on Upgrade or go to http://www.logos.com/upgrade
I own Portfolio, so the upgrade suggestions for me are add-on products, not the next level base package. On the old site I had complained that many of the suggestions are for things I already own. I was hoping this was going to be fixed on the new site. It wasn't.
Furthermore, the "Add to Cart" buttons are not grey for those items I already own.

Of these, I already own BDAG/HALOT, AYBD, Ariel, JPS Tanakh, and Horae Homileticae