Thank you for the quick reply.
I was already uploading it to Mega, I hope that is fine. The link is:

https://mega.nz/#!XfY3CYgA!ea6OxvD7H6Mxs6HZARioxwylTvMl7TmbsbGHwbokuxg

I was not certain that it was the file size, since the upload error was inconclusive and the forum description about ...

Multiplayer game, people were building rails and the server crashed. As usual, disconnected people can make a local save game of the last state.

At the very moment of the crash I finished the second layer of a two-tiered roundabout that had no signalling yet, and with a train inside. It might have ...