- Remove fallback chain in get_model_dir that redirected diffusion_models -> unet -> checkpoints when the requested type was not registered in ComfyUI's folder_paths. - Now create a folder named after the normalized type under the ComfyUI base path, preserving the user's selection. - Add diffusion_models to the known_types list in manager.py so the "open folder" safety check recognises it as a valid path.