Hi Bob,
Normally the BB1 and B2 software is updated by going into 'Settings' --> 'Web Upgrade'.
However, on a few occasions, the update instructions have instructed us to download a file to a USB stick and use 'Settings' --> 'Maintenance' --> 'SW Upgrade' to perform the update. But the software update webpage gives guidance on that, so it's not a problem.
Regards,
Peter.