To change your email address:
Go to the profile page
Change the Email form with the new email address
Click on the Update Profile button.
After this, it you will receive an email to the new email address for verification. Click on that link and you should be all set.
Note: You can change your email address only if you signed up with an email and password combination directly on FloydHub. If you used Google or GitHub login to create your account, you will not be able to change the email address on FloydHub.