All our theme updates are available in your ThemeForest.com profile for free: simply redownload it in “Downloads” tab.
At the first step we advise you to rename your current theme folder to something like: …/wp-content/themes/dt-THEME_NAME-old/. It will help you to save custom changes of the template.
In this example, we rename ‘dt-the7’ to ‘dt-the7-old’.
At the next stage you need to install the theme in the usual way. All theme settings are stored in a database, in an array, which is named in accordance with the theme name. Theme settings are not affected by theme files. So you won’t lost any custom settings.
IMPORTANT! After the update, go to Theme Options -> Stripes and click on the “Save Options” button.
Checkout here for theme auto update (The7 and Armada).