In a large saucepan over medium heat, whisk tomato sauce, tomato paste, sugar, molasses, vinegar, onion powder, garlic powder, and paprika. Bring sauce to a low simmer, then remove from heat and place in a blender with mango. Blend on medium speed until completely smooth. Season with salt and pepper to taste, cool sauce and then store in refrigerator until ready to use (or up to 1 week)