Sorry I will be more clear.
DeUHD allowed decryption - but in trial mode you'd only get 10 minutes worth of video. I browsed the disc, found the playlists - clicked one, and it started playing. (In VLC if I recall)
I assume it was full 4k, because that was the disc in the drive. Whatever codec is required (are there two different ones?)... It seems to be installed on my PC already.
Since UHD seems to be a standard BR file structure - I was hoping to decrypt using AnyDVD HD, burn to an image, and use ClownBD to make a lossless movie-only blu-ray structure.
But I'd settle for just being able to play the movie, with or without menus.