The Organizer can be launched by either clicking on the Organizer button on the Welcome Screen, when you first open the program, or by clicking on the Organizer button under the Organize tab in the program.
If this doesn't launch the Organizer, your program did not properly install and you need to uninstall it and install it again.
This happens to me also. I wonder if this is not related to the extra content files. Perhaps I have a bad installation too.