Version 3.8 introduced Folders to group animations, skins, and events, significantly cleaning up the tree view for complex characters.
As a "Pro" version, this release includes advanced tools that go beyond the Essential license: Spine Pro v3.8.75.zip
Professionals can export skeletons directly to Photoshop layers, making it easier to create frame-by-frame adjustments or motion blurs for specific poses. Why Professionals Use Version 3.8 Version 3