moving elgg to root domain?

I installed elgg on my host site and put it in a directory named elgg. Like so:
www.mysite.com/elgg/elgg-1.7.1/ It's been up and running with members etc.

Is there a simple way to move the site to have it as the root domain - Change "www.mysite.com/elgg/elgg-1.7.1/" to this "www.mysite.com" ????