Moved to Q&S so admins can see it. They'd like all questions kept to one thread that they are tracking and making notes with too, so please continue to post here - http://www.mothering.com/community/forum/thread/1276049/mdc-s-software-transition-information
I see your two boys hugging. To change an avatar, click My Profile at the top of the page. On the left it should show your current picture. Under that should say Replace Image. Clicking that should give you a popup to select a pic on your computer or enter a link on the web. HTH!
For quicker access here's the link: Software Transition
UPDATE 11/14: Admin started a new thread here --- http://www.mothering.com/community/forum/thread/1279177/mdc-s-software-transition-information-new-thread