This is a maintenance update that contains bug fixes and usability improvements.
You can update automatically using the Automatic Updater. Simply navigate to Utilities > Update WHMCS to begin the update process.
As always, manual downloads are also being made available for those who wish to upgrade manually. You can download both the full release and incremental versions from the Download page.
Thank you for continuing to support and use WHMCS and we hope you enjoy the latest version.