As you probably already know Capture NX2 is no longer supported by Nikon and it is replaced by the less capable Capture NX-D version. Few weeks ago I published a post about the free RAW2NEF software – an alternative solution that allows you to edit Nikon D810 NEF/RAW files with Capture NX2. The latest version of RAW2NEF now also supports Nikon D750 NEF/RAW files. For additional information, visit this website.