In a bowl, toss apples with sugar and 1/4 teaspoon cinnamon. Place in an ungreased 8-in. square microwave-safe dish. Sprinkle with water. In another bowl, combine the flour, brown sugar, salt and remaining cinnamon; cut in butter until crumbly. Sprinkle over apples. Microwave, uncovered, on high for 7-9 minutes or until apples are tender.