Reply To: Translate and edit on the theme

To update the theme you need download the latest version on ThemeForest -> Downloads. Then just reupload new theme via Appearance -> Themes but install this plugin firstly https://wordpress.org/plugins/easy-theme-and-plugin-upgrades/
Also, we suggest you make a backup of all your files before any update. The latest version currently available on ThemeForest is 1.7.