Thank You for contacting us.
To make the theme as per demo, please refer below to the documentation for a better understanding.
Please take backup of your site if any data is available before activating the premium theme.
Here is the link: https://www.themagnifico.net/eard/wathiqa/ecommerce-pro-doc/
We hope this gives you the information you need.
Please let us know if you need anything further and we would be happy to help.