No, ESP Workstation is not compatible with 64bit version of Windows 7. There is no version compatible with this architecture. Even the Workload Automation that works in conjunctions with ESP Workstation is not compatible with 64bit versions of all the operating systems.
By default ESP Workstation is compatible with Windows 95, with service release 2, Windows 98, Windows ME, Windows 2000, or Windows NT with service pack 6.