This is a small patch aimed at fixing incompatibility issues with recent Windows updates. File structure has changed a little as well as the main exe file's names. Updating should work smoothly but if the game fails to launch, try the "verify game files" button in the "properties/local files" by right clicking the game in the steam library list.
If you have experienced odd slow downs, lower than 60 frames per second or other sync issues, this should fix that problem.
No new content was added by this patch.