Yes, I have "Allow applications to take exclusive control of this device":
View attachment 67099
The Tidal Settings in the File Menu takes you to the settings dialog:
View attachment 67101
^^^ then click the Streaming Tab to select the Sound Output device for exclusive use,
and then click (More Settings) to get into this dialog:
View attachment 67098
When I toggle the Tidal "Use Exclusive Mode" option in the Tidal Streaming settings dialog the FiiO M15 USB DAC mode display changes from 384k/32bit to indicate the change, in this case to 88.2khz/32bit, and if I toggle the "Use Exclusive Mode" off while the Master Track is playing the FiiO M15 USB DAC mode display changes back to 384k/32bit.
And, here is the youtube playback error when Tidal has Exclusive Mode use:
View attachment 67113
Immediately as I disable "Exclusive Mode" toggle in Tidal I can refresh that youtube page and it will begin playing with audio.
I'll report back when I hook up the D90 MQA and see if that works the same.