From the announcement:
Fourth Edition! A new 4th edition, funded on KICKSTARTER, is now available. The success of the Kickstarter campaign has made Napoléon better for everyone - all 4th edition copies has metallic foil unit labels and a deluxe map and battleboards.
The 4th edition brings the game back to its 1st edition roots with some improvements. Napoléon can be played by two or three players.