If you are using a Mac:
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This opens the Creative Cloud Desktop Application.
Creative Cloud Desktop is where you’ll download and install the specific Adobe applications you need. For instance, if you just need Acrobat DC to create and edit PDF files, click the "Install" button. You can then access it from within the Creative Cloud Desktop or from the Launchpad. If you were granted access to the Creative Cloud suite, then you can install any other program listed in the Creative Cloud Desktop.