Hi,

I am having an issue with exporting. I made a skeleton, exported it as a .gif and everything worked fine. Now when I duplicated the skeleton, and trying to export the new one, Spine gets stuck when opening the export dialog with the new skeleton. (I'm using 3.7.43-beta instead of stable, as it has much better export options.)

Project file included as an attachment. (images not included, they are not needed to repro the hang)

Steps to repro:
1) open the the Spine file
2) ctrl+e with 'sleep' skeleton on, export dialog opens properly
3) ctrl+e with 'party' skeleton on, export dialog gets stuck (doesn't crash, just infinitely stuck)