At this step, I see a dialog that says: "A LiveReload server with the selected configuration must be available to complete this operation. Do you wnat to apply the configuration and (re)start the LiveReload server ?"

Underneath, it has 2 checkboxes with the first one checked:

        Inect the livereload.js script in HTML pages
        Allow Remote connections

I assume you take the default and click 'Yes'?