RouterPassView will help you to recover your lost password from your router file. Most modern routers allow you to backup the configuration of the router into a file, and then restore the configuration from the file when it's needed. The backup file of the router usually contains important data like your ISP user name/password, the login password of the router, and wireless network keys.If you lost one of these password/keys, but you still have a backup file of your router configuration.
What's new in this version:
Version 1.47 has added support for DD-WRT files.