trying to authorize ID after installing on a Mac

Hi,

I installed Adobe Digital Editions 3.0 on my Mac without authorizing an Adobe ID.  Now I want to transfer library e-books to my Kobo, but can't do so until I authorize ADE.  However, there is no menu option in the program for me to do this.  Does anyone have any suggestions?  I tried uninstalling and then re-installing, but I was never given the option again to authorize.