It looks like you already figured it out but I'm posting it out for anyone else that wants to know: Click Profile at the top of the page to go to your profile. Then click edit profile on the right hand side of that page. That takes you right to the Edit Avatar part of your profile. Click on the Use only Uploaded/Linked Avatar and upload it on the right hand side. The first box is to upload an avatar from your computer or to link to it on the web. The other option allows you to create your own Avatar person. Make sure to hit Save and there you go.