On a lightly floured surface, roll crust to a 1/8-in.-thick circle; transfer to a 9-in. pie plate. Trim to 1/2 in. beyond rim of plate; flute edge. Refrigerate 30 minutes. Preheat oven to 425°., Line crust with a double thickness of foil. Fill with pie weights, dried beans or uncooked rice. Bake on a lower oven rack until edge is golden brown, 20-25 minutes. Remove foil and weights; bake until bottom is golden brown, 3-6 minutes longer. Cool completely on a wire rack., In a small bowl, mix flour, salt and 1/3 cup water until smooth. In a large saucepan, combine sugar, 1 cup blueberries and remaining water; bring to a boil. Stir in flour mixture. Return to a boil, stirring constantly; cook and stir until thickened, 4-6 minutes. Stir in vinegar and remaining blueberries; pour into crust., Refrigerate until filling is set, 4 hours. Serve with whipped cream.