I must be missing something here, probably one of those duh moments. I downloaded the Avid codec pack 2.3.7 for Windows from the link below and ran the installation (twice). The package claimed to install correctly. However, when I go export media to the codec list in PP CS6 I don't see any Avid codecs listed. ???
(Prior I installed Lagarith and had no issues - it appeared as I expected.)
I know this is silly to ask but I have too. Have you restarted your computer after you installed the codec pack.
Also are you selecting "Quicktime" as the format and then selecting DNxHD for the codec choice. Because it won't show up under Microsoft AVI which
I'm not trying to be silly but I have to ask.