WHMCS have now moved their 5.1 release from beta to stable.
This latest update contains over 200 changes, bug fixes & improvements to all aspects of the WHMCS system.
Highlights include Customisable Order Statuses, New & Improved Reporting Tools, Blend Admin Theme Revamp with Closable Sidebar, New Client Area Domain Addons Management, Improved Calendar Functionality, simplified & more powerful Admin Area Order Process, Global Client Notes, all new Domain Syncing Routine, ability to Retire Products, Ajaxified account look-up tools from Tickets, Customisable Ticket Masks, and much much more…
For a detailed list of changes, please refer to the full changelog @ http://docs.whmcs.com/Version_5.1_Changelog
The update is available to download immediately from our client area, and instructions for how to upgrade can be found in our documentation at http://docs.whmcs.com/Upgrading