FINALLY! Thanks to all... it was that #$%$ inputmanagers !! SAVE THIS FIX!!!
All, after many hours trying EVERY proposed fix on many threads, I FINALLY found the solution. It's pretty simple. This fix is thanks to nickburlett on this thread (https://forums.adobe.com/thread/1636876). Simply "Clearing the contents of "/Library/InputManagers" solves the problem of Creative Cloud Desktop not opening after installing OS X Yosemite.