In order to access the Theme Management Page you must navigate to "Appearance → Portus Management"
To import our demo page theme options you can navigate to "Management → General → General", there will be a section called "Export/Import Theme Settings".
Select the "Import" button and navigate to the place where you extracted the archive you downloaded from ThemeForest. The file needed to be imported will be located in "demo data (xml)/management settings" directory.
Once the theme settings are imported, you can set up the widgets.