Is there any reason this shouldn't be compatible with LTspice XVII? It does't appear as a placeable component in the "place component" menu, after adding the .sub files to lib\sub and the .asy file to lib\sym -- although for some reason I can place it from the working directory where it resides alongside the test circuit.
In either event, LTspice gives me an "unknown subcircuit" error and won't simulate the test file. I'm not sure how to proceed since I've never added components in this fashion to LTspice.