Having decided that Groups did more for me than Categories, I deleted all the Categories I had set up. Looks like this was a mistake, since now all my Forums are gone.
If I try to add the Forum back, the system complains about using the old forum key.
Ok, but if I use a new forum key, then the system says it is adding it/has added it. But when it refreshes the page, there are no forums. Arggg...
Have I missed turning off Categories somewhere? I don't recall needing at least one Category.
TIA...