Changed URL on WP and can't access Website. Registered domain through Fatcow.com

First off, I BELIEVE the version is 3.3.1….

Hi,

My name is Richard and I tried to change my URL from https://www.dailydavinci.com to https://www.richardarena.com. I soon realized my mistake and I know that I saw other posts on this, but have no idea how to access my settings to change the few lines of coding in the “Changing the Site URL” advice. My domain is registered through Fatcow.com. I ran XAMPP for a localhost initially…and that was before I uploaded my site to the internet, but there has been a LOT of work done to it since. Therefore, I really want to try to salvage this. Which will be the best way to get my domain back?

Please help!

-Richard