Pinacle released their flasgship product of Studio 16. As you can see, you are 8 versions behind. A lot of things have changed regarding functionality and support since then. Studio 8 was released on 2002. At that time, Windows XP was the king of Windows operating systems and it was vastly used. Windows 8 does feature Windows XP backward compatibility settings for applications but it is hard to say if it will fully work. An upgrade to the latest version is highly recommended especially if you have a powerful computer.
You will need the Plus version of the MovieBox if you want compatibility in Windows 8.