Right now MC is playing conventional 2 channel 24/48Khz Flac files in 7.1.4 Surround Sound, via HDMI, on my Dolby Atmos Equiped Samsung harmon/kardon soundbar with Surround Sound Upmixing switched on in Dolby Access for Home Theater. But if I was to switch to playing the MKV created from my Beatles Abbey Road 50th Aniversary DVD and selected the right audio stream the Atmos Prosessor would cut in.
The author of that article you linked to got something slightly wrong about the Dolby Access Ap for windows, Access for Headphones is free Access for Home Theater is the one you have to pay for.