WP theme comes bundled with Slider Revolution. Full documentation for Slider Revolution can be found here.
Bundled plugins do not require activation license! Please see Plugins License page.
To add slider without Visual Compose, use Shortcode Method To add slider using Visual Composer, simply add Slider Revolution element to the page. Importing Slider
You can import demo sliders by going to Slider Revolution/Import Slider and browsing file in main files download package inside Demo data / folder.
Seeing a red warning where a revolution slider should be? You just need to import the demo slider included in your themes Demo Data folder provided in your package