First you need to register
PhotoKey 1 with your 'FXhomer116123' user account.
Or, if you previously registered the program with a different user account, then login to FXhome with that other account.
Without doing that, the Store can't offer you the upgrade price.
In the FXhome Store you'll see PhotoKey 2 under the Photo section
Once you've done the above registration, you'll be able to see an 'Upgrade from PhotoKey 1' button. Click it to add the product to your shopping cart.