This will happen if the 'Manage activation' in the plugin's folder under the Start menu is accessed.
Corel VideoStudio Pro X5 has NewBlue Titler EX as a registration incentive and as bundled software with this product. To access it, you may select it from the 'FX' library in the program's Edit menu. This filter plugin will normally require you to register the product for the first use. Once done, you're now ready to use this product with VideoStudio Pro X5.
Please note that this process will not turn it into the fully featured NewBlue product, due to bundling limitations. If you wish to utilize all of its features, you may opt to upgrade your software to Newblue Titler Pro. To have the activation code, you'll need to purchase its Pro version first from NewBlue. See the following link for more information about this product: