I'm running v1.1.702 of CadTools and have problems with changing the units in the Vehicle Turning Simulation. The program defaults to metric dimensions and when I change the units to feet, the vehicle dimensions do not change. The path is drawn in metric, but if I manually scale the various vehicle dimensions by 3.28 it is plotted correctly.
Everything on my install should be the standard default installation with straight AutoCAD, albeit v04. I'm a fairly "old school" drafter, using a unitless drawing with one unit equal to one foot. I know you've mentioned two user libraries, one metric and one English. It looks like CadTools is independent of the CAD platform's unit settings, but maybe I should be embracing drawing units?
Thanks.