Your account profile can be opened by clicking your name in the top right corner and selecting Profile.
Clicking the Edit Profile button all allow you to edit your name, email, address, company name and position.
You can change your password with the Change Password button, which will require you to enter your current password before setting a new one.
If you cannot login into your account and need to change your password you can do so by clicking the Forgot your password? link on the login screen.