Trouble Upgrading to Pro 3 (Storyboard included)

I’ve just recently bought the upgrade for both Toon Boom Animate Pro 3 and Toon Boom Storyboard Pro 4. Only problem is I’m having trouble doing so. I assumed that the “SKU” code was what you needed. Didn’t work, let alone fit. The Upgrade key is literally the same code for pro 2. And for some reason, only Storyboard Pro appears to have a “Upgrade License” button.

Is there something I’m missing? Am I meant to enter the code a different way/place? Or is there step by step process that merely slipped my mind? Some help will be largely appreciated. Thanks in advance!

Turns out that my issue might possibly be to do with Paypal being stupid (refused my payment, oh boy). Unless what I’ve written above might actually indicate that I should have a code, Then I’ll just have to wait a bit/while til I can buy.