Hi,
I had this issue and wasted last 2 hours trying to sort it.

I have it sorted now, you can try this.

When editing your homepage, add the slider shortcode name into the field below the editing box (where it says PAGE SLIDER OPTIONS), rather than using SwiftCode shortcode to add the slider into the page content.

Try that, and your slider will go fullwidth (assuming you are using fullwidth or responsive layout in the slider settings).
Cheers,