Hey there, thanks for using & purchased our themes! you should need to set homepage under the Settings > Reading > Homepage page as homepage.
By the way you should need to create a page named homepage with homepage template.
If you click to import demo contents xml file under the Tools > Import you’ll get full demo contents like as the demo.
You don’t need to edit any code from the theme editor.
Also you can insert this snippet into the editor area (text mode)
I hope those are clear.