THX for reaction, as written on AVSIM, one start was OK after addonmanager use, starting from the gate seems OK also, but on my second try to start from active runway, again a big bang and crash, mesh is at 10. PC is 2017 and powerfull. I use default settings. Very bizarre, sometimes when i choose start from active runway, i come in a situation where the bus is in shortfinal, in cold and dark, with joystick i can land on runway and with brakes the plane stops on the runway, still in a cold and dark cockpit...