Hello,
The easiest way to modify your WordPress URLs is via the
wp-config.php file. If you've moved your WordPress site or are trying to test it from a temporary URL, this also might be the only method that works for you.
1) Edit your wp-config.php file.
2) Define your WP_HOME and WP_SITEURL settings by inserting below lines to the top.
Quotedefine('WP_HOME','http://example.com');
define('WP_SITEURL','http://example.com');
That's it. :)