Manually changing the Associations in Bridge will only work for files which you open through Bridge but will not cure the problem if you open image files through the Finder because all of those will launch CS6 and open in that version.
Only by removing CS6 from my HD was I able to re-establish Ps CC as my default application.
Once you have removed CS6, manually changing the File Associations in Bridge's Prefs becomes unnecessary as Ps CC will automatically be selected there too as the Default.