It looks like you changed your reply from last night but I had enough to go on! Thanks so much. I have older versions on a Sierra machine and that works as I expect - it asks me to save before exiting.
Sierra does have that setting in System Preferences, but despite being a Mac user since 1987, I have no recollection of having to turn it on! But mine *is* on in the Sierra machine. Could have been a change in the OS over the years I guess.
I checked my Big Sur machine, where I run the more recent versions and it is turned off. I turned it on, went into TT 2022 and it's working the way I want it to - at least for now.
I do agree that for doing projections it's safer to work on a copy of your data, but there are many reasons someone would want to "Revert Changes.
Thanks for your post!
