I upgraded to LR6. But upon now I never got the program to function. After activating the shortcut (also as administrator) the cursos "freezes" for a moment and ... that's it. I have changed the names of both maps as mentioned in other reactions. I have logged out/in in my Cloud, I reinstalled it, I even reinstalled the complete pc. Nothing helps.
I use a Win7 64bit platform, other Adobe soft: LR5, Creative Suite 6 (Photoshop, Illustrator, InDesign and Writer - these all work as they should).