What is a child theme?
We strongly recommend you to use one, otherwise you would lose your changes after a new theme update.
Download the child theme
You will find the child theme in the download bundle. Navigate to Envato Downloads Utillz All files & documentation. Unpack the ZIP file and extract only the file called Utillz-child.zip.
Install the child theme
WordPress considers a child theme as a separate theme. So installing the child theme works like installing the parent theme. Navigate to Appearance Add new Theme Upload, then browse the zip file previously download and extracted from Envato. Click Install Now and the theme will be uploaded.