To update your WordPress® URL please click the following link.
 
http://codex.wordpress.org/Changing_The_Site_URL
 
Once you have changed your WordPress® URL you will need to ensure your domain name is pointing to the correct directory.  Below are instructions
on how to edit your directory pointer.
 
How to Edit/Redirect Pointer:
 
1.  Log in to Account Manager:
a. Open a Web browser (e.g., Netscape®, Microsoft® Internet Explorer, etc.)
b. Type http://www.networksolutions.com in the address line then press the enter key.
c. Click on Manage Account in the upper right corner, then Log in with your User ID and password.
2.  Click My Hosting Packages

Note: If you have one hosting package, go directly to Step 4.  If you have more than one hosting package, click on the Hosting package for which you
want to un-assign a domain name.

3.  Click on the Assign/Edit Your Domain icon
4.  Find the domain name you wish to change the directory for the right of the domain click Edit.
5.  Use the drop down to the right of the domain to point to your WordPress® directory or Add directory not listed and click Select.
6.  If adding a new directory, select Add Directory not listed and click Select.
7.  Type the name of the new directory after htdocs / click Select. 
NOTE:  (On Windows 2008 servers the root folder will be labled "www" and not "htdocs".  If you purchased a Windows hosting package after 9/6/2012 you are on a Windows 2008 server.)
8.  Next, review and confirm your settings and click Continue.
9.  You will get a confirmation page, verifying that your domain name has been redirected.