Hey there,
“butler” is a command line tool. If you run it by double clicking it, it will just print some usage information, and windows will close the terminal, as it thinks it is done.
You should open a terminal, add the “butler” executable to your “PATH”, and use it from any terminal you open. At least that’s how it is intended to be used.
If you are not familiar with using a terminal, there’s a lot of material online.
Hope that helps :)