Thaw spinach and press or squeeze to remove excess water. Grease a casserole dish and set aside. In a large mixing bowl, combine the spinach, cream cheese, parmesan and 1/4 cup of melted butter. Spoon into casserole dish. Sprinkle with the breadcrumbs and paprika, and drizzle with remaining 1/4 cup of butter. Bake at 350 degrees for 25 minutes.