Thanks, Adrian. That's it!!!
I click on the play button (triangle) and stop using the stop (square) button. The measure numbers and repeat boxes are grey and unclickable which means I can't set a start bar for playback.
I have Finale 26.3.1.520. Previous versions allowed me to select the playback start measure. Even though the box for doing that selection is present, it is dimmed and I am unable to utilize it to...