Changing the email on your account when you signed up with Google or Facebook
You can then change your email on your profile by going to Dashboard > Settings and amending your email and clicking Save. (You'll need to ensure all fields are populated before clicking 'Save').
Changing your email on your account when you signed up with your email and a unique password.
You'll be able to change your email at any point by going to your dashboard > Settings and updating the email and clicking save.