There is no information about Unlimited Label Maker. There is also no website to access it in order to acquire information. Because of that, it's recommended to install another application that was designed to run on Windows 8 computers. For example Acoustica CD Label Maker is compatible with Windows 8. You can use the official website to learn about it.
For other label maker applications, I recommend checking the database of Software Informer. You'll find plenty applications related to this category.