Now, when you have installed and activated plugins ‘One Click Demo Import’ and ‘Contact Form 7’ and then you downloaded demo content. You can import demo content.
You must chooce files from folder ‘Demo data’ and press button ‘Import Demo Data’.
You must wait and after some minutes you can see ‘all done’:
Now you can see demo content on your site. Now you must choose ‘Menu-demo’ how primary menu. After that you can add slider using customizer.