The ats.cfg file format
The ats.cfg file is a plain text file encoded in any arbitrary encoding, however, UTF-8 with a byte order mark is the preferred choice.
The file consists of a single line which states the file name of the plugin to use. White spaces around the file name are ignored. The file name must have the extension .dll, and must be of a 32-bit Windows executable format.
The file name should consist only of ASCII characters for compatibility with Windows 95/98/Me. Likewise, the path in which the plugin is stored should contain only ASCII characters as well.
Plugins are not currently supported on Linux and Mac OS X, and trains will resort to the built-in safety systems ATS and ATC instead.