Hi Lawrence,

I delayed on replying to your post because I thought I'd have
the feature done by now. Turned out to be slightly trickier than
I thought, but I still ought to be able to get it to work. It
may extend into updating some other items, such as files for
artificial satellites and such. If it works as I hope it does,
it may make these functions more bulletproof. (They currently
cause a fair number of technical support inquiries, a strong
sign that I didn't design them very well!)

-- Bill