Colossi Okay, so first open Spine 4.2, the version of the Spine editor can be specified in the Version section of the Spine launcher screen, the Spine launcher screen can also be used when launching Spine on its own or when launching the Hitman Spine project by double clicking on it:
Once you have opened Hitman's Spine project, click on the Spine logo in the upper left corner to open the main menu, then select Export...:
The Export window will open. Select the export format from the list on the left, and specify the output folder, extension, and other options you want to use on the right. The JSON format should be selected by default, and this is the skeleton data format you can import into your Unity project, so there is no problem exporting as is, specifying only the output folder (you do not need to pack the texture atlas to update the skeleton data version):
For your information, the first part of the .json file has a line that stores which version of the Spine Editor the .json file was exported from. Make sure that the major and minor version numbers shown here match the major and minor versions of the spine-unity runtime you are using in your Unity project to perform the import:
More information about exporting from Spine can be found in the User Guide:
https://esotericsoftware.com/spine-export
The export procedure is also explained in the documentation of the spine-unity runtime:
https://esotericsoftware.com/spine-unity-assets#Spine-Unity-Export-for-Beginners
