Sorry for double-posting: forgot I had this option too.
I am an old, enthusiastic user of HJ, but a new, happy user of Sonix[dot]ai, and would love the ability to export from there into a non-destructive .nhsx format (which you can currently do for Adobe Auduition, etc).
We have made the some changes and exchanged information with Sonix so the ball is all in their court.
They expect to be able to save nhsx files from within Sonix.
Would love to see if there's an update on this. I just made another request to Sonix.