To edit your profile, be sure you’re first logged in. Then, click on your name or your avatar (profile image) on any page in the Forums.
This will take you to your profile page. On the bottom of the left side, click the “Edit” link. Next, make any necessary changes.
To change your password, you’ll need to log in and visit your My Account page and click “Edit Account”.
And of course, be sure to save your changes.