Add ribs; cook 5 min. or until evenly browned, turning occasionally.
Place ribs in slow cooker; top with remaining paprika, vegetables, garlic, pepper, broth and Worcestershire sauce. Cover with lid. Cook on HIGH 6 hours (or on LOW 8 to 10 hours).
Remove ribs from slow cooker; skim surface of sauce.
Remove and discard rib bones. Return meat to slow cooker with sour cream and remaining flour; stir. Cook, covered, on LOW 10 to 15 min. or until slightly thickened. Meanwhile, cook noodles as directed on package.