iWork 09 apps cannot be opened because of a problem.
I recently installed a new hard drive and in the process did a clean install of OS 10.8.4. I previously had iWork 09 installed on the old drive (from the app store operating in OS 10.6) and copied this over from a Time Machine backup.
I can now no longer open Keynote, Pages or Numbers. Instead I get the message: "Keynote cannot be opened because of a problem." I cannot seem to reinstall the apps from the App Store as they are not listed in my purchases. (Not sure if this only lists purchases made after upgrading to 10.8?) I've already tried removing the preference files from my library—they apparently don't exist so can't be removed—and running an update to iWork 9.3 (from http://support.apple.com/downloads/#iwork).
Any ideas? Any help to avoid repurchasing the apps is much appreciated!
iWork 09-OTHER, OS X Mountain Lion (10.8.4)