Hi Erika,
I checked out your json and it was different to mine! The x,y coordinates were all 1px off.
I used exactly the same export settings as you in Photoshop. I'm on a mac, using the latest version of Photoshop (CC 2017.1.1) - not sure if that makes a difference?!
When I used your json file instead of mine, and imported it (import data) into Spine, it worked!
I've attached my json file.
So still not sure what's going on there... I still can't use the script with my setup for some reason.
Man, I wish I could get to animating! ๐