Hello, export is disabled for the trial but you can see examples for each project in the export folder, that displays the result of a Json export.
With the PNG export you can export an animation as a sequence image after image, as a spritesheet (aka texture atlas), or also just a single image of the current pose.
The first demo here shows a spreadsheet export and json export for comparison: Spine: Demos
I hope this helps you but please let me know if you need anything more specific (:
