Navigation-system Professional software for a 2006 E92

[ETX]

Have to first congratulate you on a very informative forum, I look forward to spending time on here.
I am getting a 2006 E92 tomorrow with Navigation-system Professional and I am wondering which software it requires to make it up to date with full post code search.
The software map it has if I am not mistaken is dated 2007 and is a total waste of time.
Street that I live in is over 100 yrs old and it is not listed in this map and it seemed not to have Postcode search facilities.
So I wondered which software would make my navigation up to date and if I would need to update the firmware.
Exact name would be appreciated as there are so many different versions out there and am a bit lost. Thanks in advance.