You've most likely got 2.50.0. The latest is 2.50.2 (which comes with Launcher version 2.5.7). Here:
https://www.dropbox.com/s/ealno4vxo7...2-50-2-win.zip
The usual cause of save file corruption has to do with the window closing before the game's actually finished shutting down. The current version doesn't do that, so hopefully you won't have any problems with it.