I'm having trouble with changing my avatar, I choose one when I first singed up, but it didn't show up, I can't seem to figure how to select a new one? If I go to the setting page it is all grayed out for selecting a new avatar.

I'm having trouble with changing my avatar, I choose one when I first singed up, but it didn't show up, I can't seem to figure how to select a new one? If I go to the setting page it is all grayed out for selecting a new avatar.