I had Premiere pro cs6 installed on my imac, then I installed premiere pro cc. I wanted to clean up my system so I uninstalled pp cs6, but now I can't find encore. How can I find it please?
When you uninstall Premiere, you can select an option NOT to uninstall Encore. But the default is to uninstall both. So you probably uninstalled Encore.
As you probably understand by now, Encore was not upgraded to a CC version.
See this link, which includes how to install Encore CS6, how to get the library, and a tutorial on workflow with Premiere CC.
Also, see the Encore CC/CS6 FAQ:
And some more information
-a workaround for the Cloud http://blogs.adobe.com/davtechtable/