Warning: Before updating, make sure that you’ve backed up your code or that you’ve used a Child Theme.
Using a Child Theme
When updating themes frequently, it is important that you use a Child Theme for your customizations. Otherwise you risk losing all of your work when you update the parent theme. More can be read into detail here. You can save many hours knowing how to work with Child Themes before it’s time to update.
Updating free themes
If you are using a free theme from wordpress.org, updating is super easy. As soon as an update is available, it will appear in your WordPress dashboard. Just click update there and your theme will be the latest version available.
Updating premium themes
Updating premium themes purchased from this website is almost as easy as receiving updates from wordpress.org. You just need to make sure that the theme is activated and that you’ve added your license information in Dashboard > Appearance > Theme License > License Key.
Once this is done, you will receive the updates in the WordPress dashboard just as you do with a free theme.