Yes, sorry, I did not explain myself. As I had problems for reinstalling 300 extension I tried to uninstall FSX original and removing 777 from both games, original and SE. Things then became worse as now, after uninstalling complete 777 from FSX SE and FSX original and FSX original game, when I run new installer downloaded from my account, I get an error that a valid FSX license was not found. I also tried to uninstall FSX SE and installing again but the same.