To elaborate on what Zombs is saying...
I initially thought they were spouting nonsense, since the "Download" buttons are clearly on the front page of the game and I was able to update just fine using my previous links (I've bought everything so far)
. However, when you click on anything past the .10 version on an account that hasn't already purchased, something pops up that says
"Your request cannot be completed.
Key must be provided"
Feyada, it looks like you disabled the ability to purchase higher versions through the main page. I'm not sure about anywhere else, but the more convenient way isn't working.
Zombs, in the future you might wanna provide specific details about what the issue is, especially if at a casual glance it looks like everything's set up properly. Hopefully you'll be able to get the game soon, it's fantastic!