Please download the updated theme from here https://themeforest.net/downloads
After then, follow the steps below to update the theme.
1. Go to Appearance -> Themes
2. Active another theme & delete the bizwalls
theme
3. Click Add New -> Upload
Theme
4. Upload, install & activate the latest version of bizwalls
theme
Moreover, you could try Envato Market Plugin http://envato.github.io/wp-envato-market/ for automatic update.
***(need to update the “bizwalls” Theme. After then need to remove the “vpnsf” plugin and reinstall the plugin to get the above changes)***
Best Regards,
ThemeLooks Support Team