Sorry that happened. Typically there is persistent game data which is stored separately from the game folder itself, which is where stuff like the gallery is kept. On PC this is found in the "Roaming" folder, and then under "RenPy", and "OurLife". I don't own a Mac, but from what I find online, it seems to be located in a path labeled "~/Library/RenPy", followed by the specific game, in this case "OurLife". That might be where the issue occurred, and forgive me if that path is the wrong one. If you find it, when was the "persistent" file in the "OurLife" folder updated last?