Directing to 404 page

Dear Friends,

Have had a look at the information about permalinks. I honestly don’t know what any of this really means and I am reluctant to change the setting because I don’t know enough about the impact such a change might have. I got locked out of the site and was advised to change the config.php file with the following settings

define(‘WP_HOME’, ‘http://www.irishblessingstours.com/blog’);
define(‘WP_SITEURL’,’http://www.irishblessingstours.com/blog’);
/**#@-*/

This allowed me to get back to the dashboard but since then the menu tabs go to a 404 page.

Any further suggestions.

Blessings

Bee