The GNU/Linux version can be downloaded here.
I've asked David to create a Windows port.
[Edit: and...] The Windows version can be downloaded here.
This new version features:
+ Added a screen that can be used to (deliberately) create, change and fix so-called broken room links.
* Fixed a minor bug that sometimes caused unintentional changes to events.

(Don't worry, the old room links screen still exists. The new screen is just an addition.)