In large bowl, beat cream cheese with electric mixer until light and fluffy. Beat in eggs, one at time, vanilla and 3/4 cup sour cream. Beat in sugar, cornstarch and cinnamon until mixture is smooth. Gently fold in caramel ice cream topping and apples. Pour into cooled crust. Place a shallow pan of water on bottom rack of oven. Place springform pan on cookie sheet in oven. Bake 1 - 1 1/4 hours. Turn oven off and leave for 1 hour. Remove from oven and refrigerate at least 4 hours or overnight.