Under Suffusion Options on Introduction tab you have an option to export all options to a file.
Once you have exported the file you have to copy it using FTP into /wp-content/themes/suffusion/admin/import, create the folder import manually.
Under Suffusion Options on Introduction tab you have an option to export all options to a file.
Once you have exported the file you have to copy it using FTP into /wp-content/themes/suffusion/admin/import, create the folder import manually.
Using phpMyAdmin edit the database, look for wp-options table and edit the values for siteurl and home.
A tutorial can be found here
http://www.tamba2.org.uk/wordpress/site-url/