have you visited this page?
here are the only choices i see after logging in:
This information is primarily used if you are a Stardock customer.
Your First Name
Your Last Name
Your Phone Number
Zip or Postal Code
Information other users can view.
I see no email choice! I'm not trying to be difficult, I just want to update my email, but I see no option there.
Also you said Account Management - this is not a category anywhere, just: "Account."