How can I move my site from sz1.me/public_html to sz1.me/?

basically the url i want to go to sz1.me  and not sz1.me/public_html

 

http://sz1.me/public_html/  is my elgg domain name now lol 

 

also i installed with mr-kluxo  using a vps all done just forgot how to change domain after basic for dummies instructions or advice please and if you notice i have made any mistakes or tips for me please let me know : )