Incidentally, despite the readme saying to turn IK off, turning on IK on with PoseMagic can actually give better results. Let's go back to the Crouch example. Crouching the figure in PoseMagic with IK off gives the result seen in the first pic - the feet are pointing downwards and are situated below ground. But crouching the figure in PoseMagic with IK on the figure's feet bend very slightly upwards (this is very easily fixed) and the heel of the foot stays on the ground.