User question: The user needs to reinstall WD SmartWare for their older WD My Passport Essential drive. They are asking which version they need and if the most up-to-date version is available for their drive.
Unfortunately, the provided information does not specify the exact version of WD SmartWare required for the specific WD My Passport Essential drive mentioned. The user should visit the official Western Digital website or contact their customer support to obtain the appropriate version of WD SmartWare for their drive.