If you want to change your current password
Click on your profile name of photo
Choose the option: Change password
Then:
Enter your current password.
Enter the new password.
Re-enter the new password in the field below.
Click SAVE.
To change/update your email address or name:
Click on your profile name of photo
Choose the option: Edit profile
Then:
Change your Registration ID (email address) or personal data in the following fields.
Click SAVE