Having been asked by a client to change the Admin home page title that displays in the browser, this simple little job proved anything but!
Either there's something wrong with the way things are on this particular cart, or there is a rather weird anomaly in ZenCart (using 1.3.8a but I don't think that matters)
I would have expected the define to be in one of the admin language files...but no - the only way I have been able to change that page title is to edit /includes/languages/english/meta_tags.php and alter the define('TITLE', 'ZenCart!'); and re-upload it - it does NOT work from the override directory.
Is this correct?