Dear Rick and Fedsec,
I tried the method of renaming the database and pointing it to a renamed backend but it seemed to still have a link to the old frontend. When I tried to make it a master vs. the replica it was, it seemed to think it still was the old one.
I.e. It warned about having two masters with the same name although I thought I had renamed them OK.
I think renaming a frontend still leaves some ID inside that isn't so easily ignored.
Well then I tried to just create a new named DB by doing a NEW then dragging forms, reports etc from the original. I ran into a problem here with an old problem where I had to rename a field incorrectly named NAME to NAME3 to avoid using the reserved word. Why this was I don't know as I thought I had made the switchover properly (the program seemed generally to run OK). I'll have to revisit that.
At any rate, I proceeded and deleted the old records thinking I was safe with a new named frontend and backend. Well the NAME/NAME3 thing prevented the forms and tables using it to appear so I aborted and reverted to my backups.
But lo and behold, now my backups were screwed up because of the NAME/NAME3 thing. This really surprised me in a serious way.
But luckily I had another backup which was supposed to be identical, this one ran OK.
Now I'm getting gun shy, ACCESS seems to be to be full of rattlesnakes for the novice like me. Also it is opaque with error messages which give absolutely not guidance about where they come from. Eventually I'll probably learn how to debug but I haven't yet.
When my backup was corrupted that really threw me.
Well back to the drawing boards for now. Thanks to both for the help. Seems like this should be simple and easy.
John