The latest Majestic update was released on 20th March 2015. Here's what's new:
Quote
+ Fixed the problem with Q400 crash on resize under Prepar3D 2.5 when
mipmap panels option is off
+ Fixed the Prepar3D audio problems in the Cabin views Modification to
+ the copy protection, allowing usage of the Q400 under
several simulators on the same PC
+ Fixed the non-transparent windows in the Cabin views when the cockpit
dome light is activated
+ Aileron to Tiller control will disengage at 50 percent Power Levers
angle, and center automatically for takeoff
The v1.014 update includes all previous updates, including the Flight Simulator X:Steam Edition compatiblity which was introduced in v1.012
I believe this is a complete installer so as ever, please backup your repaints (including the lines from aircraft.cfg) and your settings (mjc84.ini)