The latest version I am not sure of. But after resetting the NIC and rechecking we can be sure that it is indeed the latest. Yes it does reset everything to default as well. This is not a bad thing at this point since you in still not in stable system configuration. I found a few features in reference to your tv I think are worth looking into. Mainly the 2 in blue. I would recommend leaving the Denon in default settings at this point as well. (I know you had no issues by passing the Denon however, in tandem with the avr these could have a different effect.)
Advanced Video Settings: In addition to the Picture mode, the Advanced Video Settings menu also features the following:
Auto Light Limiter: Reduces glare such as in scenes where the entire screen is white.
Black Corrector: Enhances black areas of the picture for stronger contrast. The Black Corrector can be set to High, Medium, Low, or Off.
Detail Enhancer: Enhances the details of the picture.
Edge Enhancer: Enhances the edges of the picture.
Skin Naturalizer: Makes the texture of the skin smoother (available for USB and Media server content). It can be set to High, Medium, Low, or Off.
Gamma: Adjusts the balance between bright and dark areas of the picture.
Clear White: Emphasizes white and light colors. It can be set to High, Low, or Off.
Live Color: Makes colors more vivid and reproduces clear skin tones. It can be set to High, Medium, Low, or Off.
White Balance: Adjusts the color temperature color by color.
Pro Picture Setup: The Pro Picture Setup menu allows for Color Matrix and HDMI adjustments.
Color Matrix: Reproduces the color-difference signals. It is recommended to leave this at the factory default setting.
HDMI Dynamic Range: Produces natural color by changing the luminance tone reproduction of HDMI input color signals.