(Mac and linux coming soon).
Here are the 1.09 changes:
Fixed bug where escape key allowed you to quit from policy screen without confirming changes.
New system to detect if the game can't run fullscreen the first time, and force a windowed run on second attempt.
german characters now render correctly.
Support for steam workshop.
Better mod browsing interface and link to modding website.
Ability to delete and thus uninstall a mod from the GUI.
More explanation here: