BattleGoat Studios announced an additional free update to Supreme Ruler 2010, as well as the new, lower price of $19.99. Check the press release for details on the update and visit the official website for a direct download of the game.
Update: the patch is now locally mirrored (thanks: The Patches Scrolls).

Supreme Ruler 2010 v4.6.1 Patch (34.77MB)