I just opened a new file, selected he time signature button and double-clicked the first measure, as I've done a million times. The time signature window doesn't open. Same with the key signature t...
Well, I had tried that and it didn't work but now I've tried it again and yes, it does. You have to hit stuff just right, apparently, but yes that fixed it. Thanks.
Sorry for breaking the rules. I'll just keep banging my head against the wall. Maybe that will work.