Hi there. I have downloaded Adobe camera raw 6.7 upgrade. I still can't open my D800 files. Any ideas?
Download the latest version of the Adobe DNG Converter for free (check the downloads page of the website). Convert your D800 NEFs to DNG and you can open them in CS5/ACR6.7.
Alternatively, you can use Lightroom 4.4 as a raw converter, or upgrade to CS6.