To edit your avatar, click the triangle next to your account name in the upper righthand corner of the Kartridge application window and select Account Settings.
From here, you can use the Edit button next to your current profile image and select an avatar or background you wish to display.
You can also revert to your previously selected avatar. Avatar frames for users are circular. Admin and developer account frames are square-shaped.
If you have any trouble editing your avatar, or believe you did not receive an avatar as a achievement, please contact firstname.lastname@example.org