Hello Avigrace,
I thank you for your answer, it does not come with a registration key, because the recording online game is fine and works properly without the patch 1.6.
I also tried running the game in administrator mode, this is also what I usually do when I have a problem with a software
But this time, nothing is impossible to launch Take on helicopter.
More I can not contact the technical team of "Bohemia Interactive" at the following address:
"support@bistudio.com"
Could there be another solution to contact the after-sales service "Bohemia Interactive" please?
Thank you for your help, Alpha36.