I am working with digital audio workstations since more than a decade now. So I am also familiar with the "original" Izotope tools. i.e. RX. It seems that it is not possible to select single channels of a multi channel recording in AudioDirector 5, either stereo or 5.1, for editing.
E.g. I have a 5.1 video recording with a click on the rear channels. How can I only select the rear channels for editing?