Apple Configurator 1.3 may quit unexpectedly in OS X Lion
Resolution
If you have not updated to Apple Configurator 1.3
If you use OS X Lion, continue to use Apple Configurator 1.2.1, or upgrade to OS X Mountain Lion.
If you have updated to Apple Configurator 1.3
If you still have a copy of version 1.2.1, you can revert to it and restore the previous database files with these articles: