Hi James,
I've checked the How to Download Simutrans-Extended topic, but couldn't find this. Is it also possible to download a stable version rather than the nightlies?
Kind Regards, DoR
Currently, the only version is the development version, which is released by way of nightly builds. Simutrans-Extended is currently in early access, and is likely to remain so until the balancing of at least one pakset has been completed fully, which is quite a few features away.
I should note that the current nightly builds of Simutrans-Extended are no less stable than the old release builds of Simutrans-Experimental.