I can confirm that your version of the B2 software is now so old that it is not possible to update it using the standard B2 tools.
I would suggest you order a new SD Card (which comes with the software on it) from Brennan, it costs about £10.00. You need to order the correct
Sized card, if your cards sticks out of the right hand side of the B2 you need a standard SD Card and if not a Micro SD Card. With the latter you will
Need to open the back of the B2 to replace it.I
Either way the first thing to do after fitting the new card is a "Web Upgrade" as the software on the card may be a little out of date.
Fred