Currently, the Editor only works when it gets exclusive access to my audio interface. With this setting 'off', picking the right audio interface turns back to 'none'. With exclusive access, the sound is jagged (not sliced, the loop doesn't sound well). I used a virtual audio interface to fix this (VoiceMeeter) and it worked (not jagged) but if you're not PC savvy it's hard to figure all this out and it should not be necessary in 2021.