includes/config.php exists, but is not in the 3.6+ format.

[sparksromeo]

<font color="Red">"Configuration: includes/config.php exists, but is not in the 3.6+ format. Please convert your
config file via the new config.php.new."</font>
Is the error message I get. I am running the latest 4.xx. To strengthen the password I downloaded the config.php file and changed the db password using "WORDPAD". Changed the db password on the server mysql . When I go to the site with I.E. I get the error message. Replaced the original config.php file and everything works. I did use the "config.php.new" at the last update/installation. Can anyone suggest something?, Thanks.