Don,
I was editing some files in the UK version of the Dr. D. Light Add On Pack, since upgrading to Version 1.5 (not the Beta Version). I was simply editing out the categories that had been in version 1.4 which wer still showing up. And creating a situation that could result in a bit of confusion.
A window popped up : Custom Category Editor
An unhandled exception has occurred in your application.
I will send you a copy of the screen print that I did, as well as the details in the window screen via private e-mail, as it will be too long to post here.