I installed Indesign CC2015 recently, worked in it and suddenly CC2015 didn't start anymore (win 7 64b).
Trashing prefs didn't help, reinstalling didn't help either (version 11.01.105).
The solution I found on the Photoshop forum did the trick, rename the librarylookupfile (ex. add the extension".old") and CC2015 works fine again.
The file can be found in:
C:\Users\%USERNAME%\AppData\Roaming\Adobe\Creative Cloud Libraries\LIBS is a file called librarylookupfile
Retrieving data ...