Click download above and then install. Next, launch one of the Creative apps and show the Adobe Exchange panel. You'll find it in the Window>Extensions menu. Start browsing...
Do you produce content for Creative users?
In addition to a panel, Adobe Exchange includes a producer portal where you
can upload your extensions, plugins, templates, actions, brushes, swatches,
styles, fonts and any other content that can enhance the functionality of
Creative Cloud and Creative Suite applications.