Thanks Jason, Have changed the file as follows:
/**
* @license Copyright (c) 2003-2013, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.html or http://ckeditor.com/license
*/
config.allowedContent=true;
CKEDITOR.editorConfig = function( config ) { array
// Define changes to default configuration here. For example:
// config.language = 'fr';
// config.uiColor = '#AADC6E';
};
Unfortunately it is still editing the code on update...