Thanks for the reply.
I have redownloaded the Spine version on Windows, look around and tried to run Spine.exe file in the launch4j-tmp directory and it does not start. Screen shot on error in attachment

About the Spine on Mac, it does not have the "launcher" folder like the Spine counterpart on Windows.
I checked the Spine main program, and in the Settings only display something like the current version, credits, and does not mention anything about select version or whatsoever.
Did I do something wrong ?
Edit: I checked the newest full version and found the version selector in the setting. My bad for not notice this before 😃. Its strange that it is not in the trial version... Anyway, thank you all for answering. 🙂