First off, have you tried our handy troubleshooting guide? http://www.guitartricks.com/logintroubleshooting.php
It has step-by-step instructions on getting logged back in.
You can also go to this link: https://www.guitartricks.com/login.php?lrt=Lw== and then click "Forgot Your Password?" beneath the yellow Log-In button.
If the issue persists, please contact our customer support team here: http://www.guitartricks.com/contact.php