There are 2 ways to update the theme:
I. Update theme by Thim Core
It’s very easy to update the them by Thim Core.
Visit Dashboard >> name-theme (ex: Charity) >> Dashboard and the theme will be updated in just few seconds.
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, as 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.