Hi Michael,
I’ve not installed Nik 6 and don’t know myself about missing modules etc., but it sounds like a bug.
Otherwise have a look at this video from Robin Whalley.
For problems with Nik, DxO provides an uninstaller, if normal uninstalling from Windows doesn’t help.
BUT – read about how to save your customs presets …
PS CS6 works with Nik 3.x as PlugIn (+ with FP 5) → see …
( don’t know about the ‘newer’ PS versions ).
At present I’m running the latest AP 2.1 with Nik 5 and 3.3 (also FP 6).
→ It was reported somewhere that AP2.1 and Nik 6 don’t like each other.
about your cams
@zkarj uses a Pentax DSLR. Maybe you communicate with him.
For the Ricoh GXR … no idea who you could talk to.
Wolfgang