If you want to change your site Demo then go to Current themes> Action >Edit code
After that select a Demo that demos you want to set up your site .
And then unzip that Demo file
Now enter the config Directory and open the settings_data.json file in any editor.
After that enter the templates Directory and open the index.json file in any editor.
After that copy the code and paste it Edit code for Brator-Shopify 1
Now you can see the demo has been change
