Lost Entitlement ID when you want to rehost/return/modify existing license.
When a rehost/return/modify of an existing license is required, the Entitlement ID is required.
Contact PSS, and provide the current Host ID (PC MAC address) /Dongle ID used, alternatively the current license file or Fulfillment ID. PSS will then provide the Entitlement ID for license in question.
The Entitlement can also be found providing the original Purchase Order ID to the order entry department at 1-888-444-1311 if in the continental US.