How to install pre-inserted demo contents?

Hello =)

I like to start over on my site: http://www.galactic-warrior-empire.com/

Went through Theme Options

Found One Click Install (Demo Install) – Import –

It said to click to install pre-inserted demo contents.

I saved all changes and nothing appears to be happening. Do i need to wait awhile?

How can I get back the demo setup? Thank you.