Peter - thanks! Unfortunately, I'm not seeing the same thing as you - when I click on the full version icon, it takes me to a product page that offers only the full version, with a note to log into your account to check for upgrade eligibility. I have logged in, but I'm not seeing anywhere to actually purchase an upgrade.
My last purchase was in May 2009, so it shows a date of May 2010 in the "Eligible for upgrade" field - that doesn't mean that I had to purchase an upgrade by the date (and so have to purchase the full version), does it?
Rick