Also make sure you are opening the correct version of PS CC! I've noticed some people copying the files to their x86 plugins folder and then trying to open the 64bit Photoshop or vice versa. If you want your plugins available in both x86 and 64bit, then you need to copy the files both places.
Hopefully this will solve most of your plugin woes. more details below...
Skip the yakking:
Install Nik: • Photoshop Creative Cloud Move Plugins...
Install Topaz and Totally Rad: • Photoshop Creative Cloud Move Plugins...
If you still can't get Topaz to show up try the steps here: http://www.topazlabs.com/support/kb/i...
...more than just Post-Production
http://www.chiseledimages.com