True Reality (TR) is an open source LGPL Game and Simulation Engine written entirely in Standard C++ and OpenGL. It runs on all Windows platforms and GNU/Linux. OpenSceneGraph is used as its graphics engine, along with many other open source projects for support of various features.
The install folder should have version numbers up to YYMM, not just Major.Minor
It should be TrueReality-Major.Minor.YYMM