Once you log in to your customer account, please just choose "My Software" in order to see all your current software along with the respective upgrade options on the right-hand side.
If you want to upgrade multiple products, first select one as described. As soon as it appears in the DxO Shop Payment window, click on “Continue Shopping” in the upper left corner and you will return to the homepage of the DxO Shop.
Click on the “Upgrade” button in the upper right to return to the “My Software” section of your customer account. Then select another product for which you want to purchase an upgrade.
To log in to your Customer Account directly from this article, please click on this link.