"Patcher" is FL Studio’s internal modular environment. Version 12.0.1 refined this, allowing for complex effect and instrument chains to be saved as a single preset. This paved the way for "Audio Effect Presets" that are standard today.
While the Producer Edition offers full core functionality, higher tiers add more specialized plugins: Which version of FL Studio should you buy? Fl Studio 12.0.1 Producer Edition Final 32Bit 64Bit
It looks like you’ve mentioned a specific software release: . "Patcher" is FL Studio’s internal modular environment