I became interested by this post and downloaded the Pro Elite trialversionn. To my dissapointment the files of my D800e didn't open; the d700 files do. I mailed the DXO supportteam and received the following answer:
"Support for the Nikon D800E camera is not part of DxO Optics Pro Version 7.5, presently. Work on D800E support is still in progress. It is planned to be added in several weeks. Best Regards "