There is only one demo you should import, the default one. Each online demo demonstrated online is included in it.
So first import the default demo data. Then chose the Homepage you want to use. Each home page is reflected in one demo online.
To setup header and footer, go to June > Home, and click on Setup header. Select the header you want to use and import it. Do the same for footer with Setup Footer.
We can help you get the demo you want setup in minutes. Just send us some wp credentials in a private reply.
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