When you lose your router password, you can no longer log in to the router admin interface. The usual way to regain access to the router is to reset the router to factory defaults. However, that also means that you lose all of your configurations and have to reconfigure the router from the very beginning.
The pcWRT router provides a more convenient way to reset your router password: by email. This is what you need to do:
You’ll see a “Lost your password?” link on the login page after that, and you’ll be able to reset the router password with your email by clicking on the link.