I think you have to login to the blog section of the website and navigate to you profile from there. Don’t quote me.
It is quite the adventure to find.
Here is what I did: I went to the main page, then clicked on the link in the top nav labeled “Forum”, which doesn’t actually take you to the forum but to more of an introductory page. I clicked the “Login” link there, but since I was already logged in it dropped me at a page with a link to “Your Account” and a “Logout” link. I clicked on “Your Account”, then on “View Profile”. This left me at a page with some text at the bottom about my profile being empty and asking if I wanted to “add” some information. Clicked on “add” and that finally gave me a profile page in full edit mode. To update your avatar click the camera icon in this page and it will give you options.