OK, that's interesting!
The new versions use the device serial number, if this isn't available for some reason it will ignore the device. Perhaps something went wrong in the HID system that has fixed itself?
Good news that it's working now though. Please keep the debug version around just in case it goes wrong again. If it does, see what debug you get from it.
OS X v10.8 Editor doesn't find device
Re: OS X v10.8 Editor doesn't find device
That could well be it. I'll let you know if it goes bad again, and will capture logs as well. Thanks, again, for your help!