Upgrade: where to buy?

[MacGuy]

Looking at the bottom of the licensing page

<http://www.runrev.com/Revolution1/licensing1.html>

I see "Studio  Upgrade from 2.0x to 2.1  $49" (which is an awesome 
price!), but I can find no "buy" button for these upgrade prices.  If i 
go back to the home page and follow the link for "pay for a license" 
and then pick "upgrades and crossgrades", I can find no reference to 
this $49 upgrade price.  How do I purchase this?  Thanks!