Your Boxee Box will automatically prompt you (when available) to download the latest firmware at start-up. You can also check to see if there is a newer version of the firmware (without a restart) by going to Settings > System > Check for new version of Boxee.
If you are still having trouble then you can download the firmware to a PC, copy it to a flash drive, and then install the firmware on the Boxee Box. Just following these instructions:
-
Download the latest Boxee Box firmware at http://bbx.boxee.tv/download/boxeebox. The downloaded file will be named boxee.iso, and that name must be maintained.
-
Copy the boxee.iso file to a thumb drive. Make sure to properly eject the flash drive after copying the file.
-
Power down the Boxee Box.
-
Power up the Boxee Box by pressing and holding the power button for 6-10 seconds. Upon release, the Box will boot with the logo turned orange.
-
After the Recovery Menu appears, connect your thumb drive to the Boxee Box, wait 2 seconds, then select Upgrade from USB from the menu, and follow on-screen instructions.