To Install the CCX files, just download and then double click the file. The installer will open up in the Adobe Creative Cloud app. Just follow the instructions on the popup windows. Watch the video above for any questions on installing with a CCX file.
IMPORTANT NOTE: When double clicking the CCX file, if it tries to open Photoshop and gives the message "Photoshop does not recognize this type of document" then there is an issue with the Creative Cloud installation on your computer. The CCX installer should open in the Creative Cloud app, not in Photoshop. So if this message occurs, you need to uninstall Creative Cloud and reinstall it (not just Photoshop, but Creative Cloud itself). This will fix Creative Cloud and the CCX installers will then work.
The are some bugs in Adobe Creative Cloud that prevent CCX files from installing on some computers. This is a small percentage of users (<1%). If you are having CCX install issues then you can install Pixnub plugins manually. Go to this link for instructions.