GETTING TO YOUR PROFILE:
To go to your profile you click on the navigation menu along the top and then the drop-down selection Your Profile (see screenshot).
As you might remember your USERID begins with @ and is how you are listed on the site. This is the only publicly visible portion of your account, and cannot be changed.
CHANGING YOUR EMAIL OR PASSWORD:
You can change your email address or password by clicking on the Settings selection on your profile page. However, be SURE to put in your current password to change either one, or it won't submit. Simply add your current password and then your new address, your new password (confirming it a second time) or both. If you change your email address you must be able to confirm the change before it commits, just like when you registered.