The only possible cause for pink textures are:
- You haven't completed a full install with a full update
OR
- You haven't updated with Live Updater and used only the Offline installer, which won't update textures and model. Before you run the Offline installer (assuming you need it, usually you don't), you must first run a normal update
OR
- You have enabled the "Virtual Airlines override" feature, which is only relevant to P3D