I just don't get it???

I purchased the Upgrade for MDW plugin and have no idea where to find the download(it's not showing up in my account just like PT12 didn't). How long do I have to wait? Will it show up there eventually? Do I have to retrieve it on another site? Sorry, I guess I just don't understand how Avid operates. Normally with other companies whose products I purchase, whether if it's a plugin or an upgrade, it automatically shows up in my account, but I seem to always be running through hoops here. Can someone explain the process? The confusion makes me want to avoid purchasing Avid's product, which I know are great but not worth the confusion and anxiety the purchase experience creates. Purchasing something should be a pleasant experience, no?
Thank you.