Railworks crashes whenever I try to load any of the Britkits diesels. In the scenario editor, clicking the box for "Alco" or "EMD" causes an immediate crash, and I can't load any scenarios with these locomotives. The rolling stock and steam locos all work fine. Here's the error I get with the diesels:
ERROR: not a serialized binary file.
FILE: ../API\core/cFxException.h
LINE: 113
Any idea what could be wrong?