You can change e-mail only if your mail is verified (confirmed).
If you want to change your mail for login or e-mail notifications, use Change E-mail button and insert new e-mail address. You will receive mail to newly provided e-mail address, where you need to confirm the address.
Fig. 1
Change password
Use Change Password button and create new password.
After clicking Update button you will be logged out and you must login with new password.
