Don’t forget these important steps:
1. Update the plugins too (Listeo Core, Listeo Editor, and Listeo Elementor)
2. Clear your website’s cache after the update

It’s recommended to configure Envato Market auto-updates plugin. It’s installed automatically with theme and you’ll find in your WordPress Dashboard → Envato Market

Theme & Plugins Update

Go to your downloads section on ThemeForest http://themeforest.net/downloads and download theme (Installable WordPress file only) – it will be the lastest version.

  1. Update Theme

    Recommended method: Upload a .zip file with the new theme version through WordPress, just like you would when installing a new theme in Appearance → Themes → Add New Theme. Then, confirm that you want to update the theme.

    Don’t forget these important steps:
    1. Update the plugins too (Listeo Core, Listeo Editor, and Listeo Elementor)
    2. Clear your website’s cache after the update

  2. Update Plugins

    After uploading new version of theme you also have to update plugins. You will see a list of plugins that require update in Appearance → Install Plugins.

You won’t loose any content or settings, but if you’ve made any customizations to source files they will be lost, so please use Child Themes http://codex.wordpress.org/Child_Themes to modify theme .php files. 😉