In order to change the ZamFoo License Key, you will need to edit the license key from the root SSH terminal. This can be accomplished by running the following command
nano /usr/local/cpanel/whostmgr/docroot/cgi/zamfoo/zamfoo_reseller_license_key.php
You will then see the following text
<?PHP
//Replace the words Enter License Key Here with
//your license key on LINE 15 below
//SOME....NOT ALL Correct EXAMPLES are Provided:
//$license="Trial-e430e667d5e4";
//$license="Monthly-e430e667d5e4";
//$license="Free-e430e667d5e4";
//$license="MasterOnly-e430e667d5e4";
//Then hit 'control' key and the letter 'o' key at the same time(not number 0 )
//Then hit the 'enter' key to save the file
//Then hit 'control' key and the letter 'x' key at the same time to exit
$license="ENTER LICENSE KEY HERE";
?>
Once your License Key has been changed, please enter "control" + "x" and choose the option to save