How can I access a station if I forgot the password?

You can always change the password from the BOG file.

To change the password of the station without starting the station it is achieved by opening the bog file in the Workbench and changing the password from the UserService and after that saving the Bog file. To achieve that please follow the following steps.
1. Opening the Bog file
2. Go to User Service
3. Change the password
4. Save the Bog file