Hello.How can I reset my FMC?I incorrectly set route.

The fastest way to do that is to reload the plane in cold & dark. I remember that this question has been asked in the official Flight1 forum, so you might want to register there and ask one of the support staff.

 

Cheers

and how to set cold and dark?

This is all written in the manual, and you have to use the configuration manager. If you have problems register in the Flight1 forum http://ifly.flight1.net/forums/ with your valid license number.

Oh cmon, that's like you said "reinstall windows", when someone ask you how to copy a file.

 

I do not own ifly 737 but I believe you can just overwrite origin airport and that would reset rest of the route.

I see you posted on the IFly forums, I would follow their advice register your product and get full forum access and they will sort everything out for you.

Agreed, just go to Route page and overwrite Origin.

Just delete the destination airportand if that doesn't clear it delete the waypoints too. Absolutely no need to reset to cold and dark.