You are to create a custom module (it is really easy!) and "decorate" the \XLite\View\PoweredBy class as follows:
PHP Code:
<?php
namespace XLite\Module\[YourDevID]\[YourModuleID]\View;
class PoweredBy extends \XLite\View\PoweredBy implements \XLite\Base\IDecorator
{
protected function isVisible()
{
return false;
}
}
This should disable the "Powered By" widget. Or you can customize other class methods to replace the line with your message.