Make ACR stop applying 40 sharpening after HDR Pro merge?

Hi all- I'm trying to find a way to set ACR's default sharpening to zero after merging photos with HDR Pro. The current default is 40. I've tried changing the raw defaults multiple different ways and nothing has done the trick yet. This is driving my production team crazy! 

I know that a new preset can be loaded each time and that I can also use previous settings, but I want to just wipe out the default 40 sharpening entirely without having to add an extra step.