Can't change <p> to <b/> tags

Hi

I just intalled CKeditor as a Wordpres plugin, after lot of research I found the issue with it using <p> tags and several sites stated to change this to <br/> tags to edit the config.js file (inside the plugins>ckeditor-for-wordpress/ckeditor folder) and add the following:

config.autoParagraph = false;
config.enterMode = CKEDITOR.ENTER_BR;

I added that but it made no difference it is still adding <p> tags when I hit enter.

This is how my config.js file stands:

 * Copyright (c) 2003-2013, CKSource - Frederico Knabben. All rights reserved.
 * For licensing, see LICENSE.html or http://ckeditor.com/license
 */

CKEDITOR.editorConfig = function( config ) {
    // Define changes to default configuration here. For example:
    // config.language = 'fr';
    // config.uiColor = '#AADC6E';

config.autoParagraph = false;
config.enterMode = CKEDITOR.ENTER_BR;
};

I am creating the site for a client and want to find a fix before handing over the site.

Please can you advise?

Thanks in advance

D