I just downloaded and installed the Creative Cloud app (OS X 10.9.3) and the app itself launches (sometimes) but just shows a loading spinner forever in the app window.
Moreover, when I try to run the uninstaller to try reinstalling the app, it quits with the following ever-so-helpful error message (regardless of whether the CC app was running in the first place or not).
Tried rebooting, logging in with a different user account, etc. No avail. *sigh*