I don't know if this has been posted already, but comodo released an update today, from version 2.3 to 2.4. Some people have been getting errors when trying to update, such as error 106, 108, 114. Since I have gotten errors 106 and 108, I did a fresh install. Here is the post on their forum of the upgrades.
http://forums.comodo.com/index.php/topic,5462.0.html 