Marie Callendar Frozen Apple Pie

My husband received a MC frozen apple pie for his birthday three days ago. He stuck in in the refrigerator rather than the freezer. I was just about to bake it when I read that it should be kept frozen prior to baking. If frozen it should be baked at 425 for 55 minutes. Will it still be good to eat and if so, how long should I bake the refrigerated rather than frozen pie?