This update is supposed to be available through the Nikon Message Center (the standard path for updates for Camera Control Pro), but it has failed repeatedly for me by simply hanging up and never completing. I decided to try to link here and the download started, but was extraordinarily slow (the browser reports 11-17 kbytes/sec) and finally gave out at about 7.2 Mb rather than the complete 28-29 Mbytes.

I'm not sure if there is an issue with Nikon's servers, but for now I am unable to download the update.