Used the v15 upgrade, load save in "congrats! you have finished Helen's story!" then "congrats! you have finished Sylvia's story!" Then crash. Can't revert. Thinking about it now, I'm going to try to download v14 again, save in a different place, then try again.
Full traceback: File "script.rpyc", line 28383, in script File "renpy/ast.py", line 1567, in execute next_node(renpy.game.context().lookup_return(pop=True)) File "renpy/execution.py", line 710, in lookup_return raise Exception("Could not find return label {!r}.".format(self.return_stack[-1])) Exception: Could not find return label (u'game/lobby_script.rpy', 1610153011, 2).