ipaelizper Regarding the messages about hotkeys.txt, Spine loads the same hotkeys.txt file in all versions, so if you open an old version after opening a newer version, the hotkeys that are now available in the newer one will not be available in the old one, so the messages inform it to you. However, this is no problem for using the editor.
have a problem when import Json file to assets.
Could you describe what problem occurred? If you were getting an error message, could you tell us what the message was?