Just upgraded and now I got a problem

Hey all... I just upgraded a company I help from time-to-time from version 1.2.4 to 1.3.8 and it looked like everything went well, but now when I try to access the main page I get the "Hello. Thank you for loading Zen Cart" page prompting me to install???

Any help is greatly appreciated. You can see the issue here CLICK HERE

I have renamed the index.php file to index2.php so that anyone trying to access the site gets their under construction page. Regardless, I get the same result if it was names index.php.

Thanks a ton.

I should add to this that the Admin section of the site is working fine... I can log in and view items, orders, customers, etc. The problem just seems to be with the storefont.

As the message says, your /includes/configure.php file apparently contains bad data.
Perhaps comparing it with your admin file may help reveal some errors?

Note that the files are not identical; however, they are largely similar, so you should be able to find patterns easily.