I purchased Affinity Photo and Affinity Designer for Mac early on. If I remember correctly, it was before they were each fully developed and you were offering them at a discount. I have since upgraded and am currently running 1.67 and 1.61, respectively. Much later, I also purchased Affinity Photo for Windows for my Windows laptop.
My Windows purchase and a few free downloads appear in my Affinity Shop account, but my earlier Mac purchases do not. (I may have used a different email for the Mac purchases, but your Shop system does not recognize that email as having an account.) Is there somewhere within the software that I can find my serial numbers to register them?