I tried "explode all takes to new tracks" and that seemed to do the trick. Definitely did not delete wrong take. Because the program constantly crashes, I have to close the program, save, and reopen again. So, undo history is gone. I will try the glue technique some other time. Because of nudging, splitting, and joining, I've messed up the recording anyway and will have to start over.
Probably should start a new thread for this but I'll try here first. If I only want to nudge one small section of one track, is the correct technique to split the section I want to nudge, then nudge it?
Stefan