I'm no expert, but I have been using VBA for years. Something just
happened that I can hardly believe.

I made a few minor changes, mostly cosmetic, to a UDF in a personal
add-in module. I usually save after every change (Ctrl-S). I guess I
was distracted and just closed the editor and Excel. When I reopened
the add-in module, the changes were not there.

As a test, I made a couple of changes and closed the editor without
saving. I got no warning that I had unsaved changes. The add-in file
time stamp did not change and when I reopened the module, the changes
were gone.

Did I change some setting by mistake?

Is there a way that I can get the IDE editor to warn me if I am about
to lose changes?