hi,
I also had the same problem, but I got it solved.
do but step by step. this way solves your problem.

1. go to your cpmputer and uninstall the complete game in your computer.
2. go to websit of capitansim and login.
3. go to your profile and to the products that you purchased.
4. klick on 767 Captain (767-300 Base Pack).
5. in the down left klick on the Extended Download Service.
6.Click this button if you wish to receive new download links:
Extended Download Service (EDS) and press get new links.

download it and install the game again.
this way definitely fix your problem.

to let us know if you succeeded.

thank you
Reza