Update new theme version
Please download the latest theme version from ThemeForest (click on the 'download' button of the theme and click 'Installable Files only' link)
You can update the theme on two ways:
1. Please navigate to Appearance > Themes
2. Activate the default WordPress theme (TwentySixteen)
3. Click on the thumbnail of the theme you want to update and click 'delete' in the bottom right corner
4. Click on 'Add New' in the top
5. Click on 'Upload File'
6. Upload the freshly downloaded theme zip file, as described above
1. Login to your server using FTP
2. Navigate to the theme folder in your WordPress installation (e.g. wordpress/wp-content/themes/)
3. Rename the folder of the theme you're currently using (e.g. theme-name-1 or theme-name-2)
4. Unzip the downloaded zip file and upload the folder to the themes folder on your server
* If you want to be 100% sure that you won't loose any content you can always create a backup with a plugin like this one, or your own favorite WordPress backup plugin.