Hello from Rome, Italy!
I purchased the theme for this specific website but I am unable to update the Layerslider.
The website is: www.rometourguide.com
If you've received LayerSlider as a bundled plugin in your theme, you cannot use your theme's purchase code to activate it as they are two separate products, item support and updates will be provided by the theme author in this case.
Alternatively, you can purchase a license from us, so we can provide our support services for you, along with our auto-update solution, beta and early access releases and exclusive offers for our direct buyers as well.
Best Regards,Attila | Kreatura Support Team