1. First, attach a USB keyboard/mouse to the USB keyboard on the TransitBox and use it to navigate to the home screen. On a keyboard, you can press "esc." On a mouse, you can right-click.
2. From there, you will want to select Settings and then Wi-Fi, making sure Ethernet is disabled. This should allow you to select the appropriate WiFi network and enter your new password.
3. Reboot your TransitScreen by unplugging and plugging back in the power cord.