If you have forgotten your password and cannot log into your account, click the Forgot Password text, located directly underneath the green Log In button on the Sign In page. (See image below.)
Once you click the Forgot Password button, a screen will appear asking you for your email address. Enter your email address and then push the OK button. (See image below.)
Once you have entered your email address and clicked OK, a screen will appear saying: "Success! Password has been sent. Check Your Email and then login with the password that was sent." (See image below.)
Once you see the screen above, go to your email and follow the instructions. You will receive a new password and will now be able to login to your account.
If you want to change your password after this, following the guides provided below: