Blender Railworks exporter not appearing

[SAR704]

Unfortunately, 3dC 7.2 has basically had it now (Stupid unrecoverable error message on startup, not sure how to prevent it), so I've installed Blender and hope to get a basic idea of how to model so I can finish off getting the buildings for the town I'm attempting to model into TS.

However, the IGS format option is not appearing in the exporter. I've followed the readme and installed Python. However, it still doesn't show up. What is the magic trick to get this to appear?

[PapaXpress]

The IGS exporter was not part of the default set. You will probably need to reinstall the plugin of it.

[SAR704]

The plugin doesn't come with an actual install program. You just copy and past the scripts into it AFAIK. This is what I've done. I've followed the readme, and yet it still doesn't appear.