Well, those files need to be there for the product to work properly, but I don't know if they need to be there in order for the forum to function with the product installed...I'm not familiar with this product.
Are you certain you uploaded the additional files to the correct place?
If all else fails, you can disable your plugins by adding the following line to your config.php file directly below the opening <?php tag:
PHP Code:
define('DISABLE_HOOKS', true);
Then you can go into your AdminCP and disable the offending product. Once done, then comment out the line you added:
PHP Code:
//define('DISABLE_HOOKS', true);