Link to download latest version of WHMCS. Print

Obtain the latest full release download of WHMCS either from
http://download.whmcs.com/ or
from your license provider (if using a reseller)To confirm an update has been successfully applied,
login to your WHMCS admin area and check to make sure that the Version Number displayed either on the admin homepage
(in the sidebar of all default templates) or in Help > System Health Status is the version you attempted to apply.