P3D – Addit! Pro V8.1.1. Addit! Pro is a comprehensive addon manager for Lockheed Martin’s Prepar3D. Easily install, manage and remove aircraft, adventures, flights, flight plans, gauges, missions, panels, AI airport and facilities data, scenery, sounds, textures, videos, weather and more! Simple wizard-based interface makes installing and removing addons a breeze. Comprehensive addon management allows you to archive, rebuild and remove addons. Addit! Pro is fast and easy–no unzipping or file copying is necessary. Modify all aircraft, panels, sounds and scenery. Let Addit! Pro tackle the tough chores and spend your time flying. By Joseph Stearns.