Thank you all for your help. It's frustating that the developers won't create a solution for this, considering there are likely many macOS users. I realize that this game is catered towards Windwos users, but we're paying customers too, so the lack of any attempt at support is interesting.
Anyway, I just got Parallels to run the 64-bit update, but now I'm finding that the rooms are flashing around me, with random objects of the room disappearing and then reappearing quickly. It's disorienting because I can never get a sense of what a room is like due to the room changing so much a