The main configuration file for Bigace that configures the following server settings:

• Database connection
• SSL Support
• URL Rewriting

is located at application/bigace/config/bigace.php.

If you accidentally deleted it, you can recreate by pasting the following code inside the file and change the settings to your server environment:

<?php
return array (
  'database' => 
  array (
    'type' => 'Mysqli',
    'host' => 'localhost',
    'name' => 'bigace',
    'user' => 'username',
    'pass' => 'password',
    'prefix' => 'cms_',
    'charset' => 'utf8',
  ),
  'ssl' => false,
  'rewrite' => true,
);

Note: It is correct that there is no closing PHP Tag ?> - read Code conventions.