You can edit your profile by going to the dropdown on your Name / Organization and selecting Edit Profile.
In the editing screen you can currently update your User Name and your timezone settings.
Do you want to delete your account and all associated data from our systems? Just send us a message over the chat in the account you signed up with.
To update your avatar image, please sign in at Gravatar, we use their universal avatar for your account email.
More options will soon follow.