I recently reinstalled Windows, so had to reinstall all my CC apps, and I have to say, it was not straight forward. There are two helpful documents that guide you through things
The CC FAQ
and CC Installation FAQ
But once you have downloaded and installed the Desktop Aplication manager, and logged in, it will know what you are subscribed to and invite you to install it. In fact you will see all of the 27 apps that are part of the CC, but only the ones you have a license for will invite you Install them. The others will say Try.
Good luck and enjoy Photoshop. There is a great list of tutorials for PS CC here