I'm a little confused about the food processor issue. Food processors are used automatically when they are around and available to them while a sim is preparing a recipe to speed the cooking process along. They can also be used to make baby food (for toddlers). Maybe I'm missing something, but I've never been aware of anything you could prepare on a food processor by clicking on it directly and eating the results right away -- unless it's a recipe like Fruit Parfait or a salad that doesn't require stove cooking, but again those can be prepared using the food processor midstream merely by clicking on the fridge to start, same as any other recipe.
NRaas MasterController has options that unlock categories and remove part filters. Could this be what you are thinking of? The options only work in MC command CAS; to see them in all instances of CAS, you would also need the MC Integration add-on module.