Are you installing CS6 add-ons using Extension Manager CC? You must use CS6, and that will work ok.
Thanks for your reply K.Woods.
Here is a screenshot of the message I got. I originally tried installing them with CS6 the extension manager (below) and after that didn't work I downloaded the CC app manager but that didn't work either. I have even downloaded and installed the "current" version of CS6 extension manager but it was the same version I already had, so the results were the same.
After downloading CC app manager, it suggested i install updates to my programs, I thought this might help so I hit update only to get the message on the screenshot below. Does this mean there is something corrupt with the update or my version of CS6? I tried to contact Adobe but kept getting thrown back to forums. I don't know what else to do.