2008 535xit Navagation question - where is software version shown?

[nekountze]

I also have a 2001 X5 and the nav software (not maps) is easily upgraded and easy to see the current version. However, on my new 2008 535xit I cannot see where to tell the nav operating system version. Are there hidden menues on this new "professional" nav system?

Thanks in advance for any info.

:)