Thank you for the replies Ron and Jeremy. Good information as usual.
Ron - Not sure why you were able to get the upgrade for $59.00. As I see it the price for the upgrade on their site is $79.00. It's been quite a while since I had visited the site so I hadn't recalled that much of the information is in German and I cannot seem to find a link for English. Of course that would have no bearing on the pricing, just not expected.
EDIT: After a bit of exploration I finally found an English link for the DxO site. All is well, except the apparent differences in price. It is indeed an Upgrade, which would seem to mean that one would be required to have the previous version in order to get the Upgrade price. I do have version Pro 2, but the price I'm seeing is $79 as mentioned previously.