Help Loading Demo Data for Highend

I have a new website 123autotransport.com, being hosted on Ipage. The increased my memory so that the theme would let me edit. But the one click install for the demo will not work, no surprise there, it’s in your documentation. I have uploaded the demo data zip file to the root of my website, and don’t really know what to do next, I changed the permissions to allow execution, but I’m not sure that I should be doing that. Please let me know how to do this, I am excited to get into this theme, it looks awesome. Thanks Dave Tracy davidatracy@hotmail.com