I am not sure if you are talking about Borders in the US or Borders in Australia. In either case, there have recently been new versions of the desktop released. Probably the one that came on your reader is out of date.
To download the newest version of the desktop available on the US Borders site go here:
http://www.borders.com/online/store/...ew_ereaderapps
For the Australian version go here:
http://www.borders.com.au/desktop-and-ereaders/