To update your profile, go to My Profile > My Account.
Next, click 'Profile' tab on the left-hand menu.
Here, you can change your profile picture and all the details about yourself. Please note that the profile picture should be square and at least 200 pixels x 200 pixels.
Be careful when changing your email address, as you will need to enter the new email address or the one you have when logging into your admin dashboard.
When you make any changes within the profile area, remember to click "Update" for the changes to take effect.
Also, watch the video on 'Updating Your Account Details as Admin for Your Account'