Hi there,
I am sorry for the late answer.
The thing is that we have two versions of Shop Isle, one available on our site https://themeisle.com/themes/shop-isle/ and one here on www.ads-software.com . The differences are that on www.ads-software.com we weren’t allowed to add a slider and an About us template and those features are not available on this version.
But, because you and many users from www.ads-software.com would want to also benefit from the slider and the about us template, we decided the only and best solution would be to release a companion plugin, that will add those features in the theme.
We just submitted an update for the theme, and as soon as the update will go live, I will come back and let you know about the Companion plugin. This will also be available in the documentation.
Thank you,
Rodica