One-click Demo install does not work

Hi,

After first time install of the theme, followed the instructions as given, but when it came to installing the demo files, the documentation says:

Installing the demo data – One Click Install
To do this you will need to head to Theme options -> One click install:

But I don’t have the One click install button..

When I tried to do it via Appearance -> Import Demo Data, as soon as the page refreshes, the website disappears all together and the only way back is to re-install via hosting from the beginning..

All I have now is a “Hello World” home page with no demo data installed..

Can you help?
Thanks
Ali