I just downloaded the update through the Operation Center, and afterwards it said there were livery data or something not found. Then I selected the option to delete these textures, and when I restarted everything of the 777-200LR was gone. I only have the -200F and -300ER.
I can't select it in the Livery Manager nor in Livery Downloader.
The 777-200LR folder is still in the Airplanes folder in FSX, but without all liveries and when I open the aircraft.cfg file, the file is empty.