Matthias wrote on Feb 15^th, 2015 at 10:36am:

Markoz wrote on Feb 10th, 2015 at 8:19pm: The warning horn comes on if the flaps are lowered to Flaps 15 or more and the landing gear is raised. If you had raised the flaps to Flaps 10, the warning horn would have stopped. ;) Hi, in Addition, you can silence the horn by clicking the little round button on the right side if the throttle quadrant right beneath the flap selector stick. You can silence the horn with flaps setting to 25 and gear up. Any flap setting above 25 degrees and gear up condition will result in a warning horn that can only be silenced by gear down. So if you fly a go around and raise the flaps, try the Warnung horn silence button as soon as the flaps are above 25 degrees. Matthias

Horn can't be silence ... That is actually the bug