It baffled me tremendously that I had to install aircraft like the Asobo A320, the King Air, the Super Hornet and the Extra and Pitts so that I was able to install the recent World Updates. I think this started with Spain and was the same with Italy. I had freed my drive of several GBs deleting these standard aircraft I NEVER touch. But they were listed as prerequisites and the Buy/install button was greyed out until I had installed them. WTH?