I have been using Cookie5 on A1412 (Mid2011) for a long time. The OS is High Sierra. I finally got A1419 (2017) this time, so I changed the OS to Big Sur. As a result, Cookie5 can no longer be used and I was prompted to upgrade to Cookie6. Since I was a registered user, a coupon code was displayed along with a message that I could upgrade at 50% off. So I downloaded Cookie6 from the SweetP Productions website, but when I selected registration, https://store.sweetpproductions.com
opened and I could only purchase cookie7. All I have is the right to purchase 6 at half price, so I have to purchase 7 at full price. Is it currently impossible to purchase Cookie6 using the above coupon?