This video tutorial demonstrates how to upgrade from Workstation 10 to Workstation 11.
Before upgrading to VMware Workstation 11, ensure that your physical machine meets the system requirements. For more information, see Introduction and System Requirements in the Getting Started with VMware Workstation 11.x guide. You will also need to shutdown any virtual machines that you may have running before attempting the upgrade.
Full details and instructions are available in VMware Knowledge Base article Upgrading from VMware Workstation 10 to VMware Workstation 11 (2081971).