Location of app-spefic files for AIR apps on OS X
If you're storing information in the encrypted data store in your AIR app, you'll probably want to nuke that data on occasion while testing. You'll find the app-specific files for your application (on OS X) under:
Update: As David pointed out in the comments, there's also a reset() method if you want to nuke the ELS from within your app. In my case, my app doesn't need this functionality but I need to test with an empty ELS sometimes so I prefer to nuke the folder.
Also, as David points out, the SQLite DB, etc. are most like stored in your application storage directory: Users/[user]/Library/Preferences/[applicationid]. (That'll teach me to double-check even my simple note-to-self blog posts; thanks, David!)