New director Mara Manus has brought change and anxiety about change to the Film Society of Lincoln Center. “One-quarter of the society’s staff has been dismissed or has resigned, prompting concerns about the group’s direction. And the Film Society’s 3,600 members are waiting to hear what perks they may lose as part of Ms. Manus’s drive to run what has traditionally been a low-key and easygoing operation ‘more like a business,’ as she puts it.”