Just for the record, the developer suggested deleting the preference file for this application and that solved the problem.
That's a fairly common fix on the mac. It's pretty standard that if your prefs files doesn't exist, you make a new one.
Newer OS X has an evil thing called "CFPREFSD", a daemon that runs in the background and serves as a "buffer" for prefs reads and writes. I suspect this is to help with wear leveling SSDs. If an app elects to write a pref value every second (no change, same value over and over) the prefsd will just cache the change and only write it to file once the app lays off the trigger for awhile. So don't be terribly
surprised if one grows back 10-20 seconds AFTER you have quit the app and THEN deleted the prefs file. I was working on a prefs corruption problem with remote desktop last fall and this was really grinding my gears, UNfixing the prefs file after I fixed it. So... you may need to wait awhile, or even reboot the computer sometimes. It doesn't bother files until you launch the app, so if you haven't launched it since login you should be able to delete it. But you may have problems deleting it right after you've quit the app.
(segway... keychain has the exact same issue, and is MUCH more persistent and problematic about it, persisting even after logout and typically requiring moving (but not deleting!) the keychain files and then RESTARTING before you can shake the pitbull daemon off the file and delete it)