I think you have set to always launch Editor from Welcome Screen.
Do you see Welcome Screen when you launch the software? If not, then it is surely the case.
To change the preference, launch Welcome Screen from the Home button present on top of the Editor window. It will launch Welcome Screen. Now Click on Settings button, and change the option according to you.
Please go to C:\Program Files (x86)\Adobe\Elements 11 Organizer and run PhotoshopElementsOrganizer.exe
How about launching Organizer from Editor using the Organizer button present on the bottom action bar?