Should I purchase CyberLink Media Suite 9 if I already have some CyberLink products?

It depends on what CyberLink products and versions you currently have. CyberLink Media Suite is the ultimate software collection, featuring all of the CyberLink DVD-related applications. If you are looking for the complete DVD solution, CyberLink Media Suite is your best choice!

If you already have some CyberLink products installed on your PC, you should check your product versions first and compare them with the CyberLink Media Suite 9 individual programs. If the existing version is newer than the one included in CyberLink Media Suite, please install CyberLink Media Suite first, the CyberLink Media Suite installer will display a dialog box if the same product already exists on your PC and ask you if you want to uninstall the existing one and install the new one. You can click Yes or No according to your preferences. You can also select which programs that you want install during the installation.

How do I check each individual program version and build number in CyberLink Media Suite 9. How do I find an update (patch) for each program? 

(https://www.cyberlink.com/support/product-faq-content.do?id=7810&prodId=186&prodVerId=737)