There are 2 ways to update the theme:
I. Update theme directly from Envato by ENVATO MARKET plugin
With this plugin, you don’t have to login to Themeforest to check for theme updates – you can quickly, easily and automatically update your themes instead.
1. Download plugin Envato Market.
Unlike most other free WordPress plugins, the toolkit isn’t available in the WordPress Plugin Repository. Download the plugin.
2. Install and activate plugin Envato Market.
3. Get API from Envato.
II. The second way: Update theme with FTP manually
1. Download the latest version.
Login your Envato account >> follow steps 1, 2, 3 as screenshots to download theme. It’s always the newest version.
2. Use FTP to replace the old theme folder in wp-content/themes by new downloaded version and update’s done.
– SAVE CUSTOMIZE after updated the theme successfully ( Appearance >> Customize >> click “Publish” button).
– ALWAYS USE A CHILD THEME
Updating your themes shouldn’t affect any customizations to your website, so long as you’re using a child theme.
If you haven’t set up a child theme before, check out the guide on how to create a child theme
I hope it’s helpful and let us know if you have any trouble on FORUM.