Hello everyone,
As some of you know, during a certain period of time, Steam provided you 5x5 keys instead of 4x4 keys. People who bought their game during that time, received those 5x5 keys. The disadvantage of those keys is that with those, you won't be able to install and play the game without Steam. In order to provide a solution, we allowed people who has those faulty keys to receive a 4x4 key from our web site. All you need to do is to register your serial key to Taleworlds site and it will automatically provide you a 4x4 key.
UPDATE: Sorry for the wrong explanation. You have to visit the link below in order to convert your 5x5 serial key to a 4x4 one:
If you have any questions or problems regarding this, please feel free to pm me.
UPDATE #2: I've been getting too many messages regarding the converter. Please be informed that this converter was made only for a bunch of serial keys that were given from Steam in a different format. For people who have bought the game in 2011, this converter doesn't have any functionality. If you want to convert your 5x5 Steam key to 4x4 Taleworlds key, then you just have to right click on your game and select "View game CD key". That's all. You can use that key for playing Mount&Blade series without Steam.