@davidsauvenier if you have the steam version you go in your library, right click on it select properties. A window will open up then click on betas which is the last section then you'll see a bar (the first one on the page) click the bar,an option in that bar is "experimental-The latest ...

I've ran into a bug while starting a new game on free play. I have researched railway and unlocked locomotive and rails but the curved rail isn't in the crafting screen. what do I do please help,