each time I select a region in the Trimmer only the video is selected even though I have previously right-clicked and set 'Select Video and Audio'. Yes, the audio is also selected at the time I do the Select V+A, but it reverts back to Video only on the next region select. If there is some Preference setting I can not find it, and/or why is the setting reverting back to Video only next time I select/make a region?