Florida Living History, Inc. is headquartered at:
2594 North Beach Street
Ormond Beach, FL 32176
It is not in St. Augustine (which is ~60 miles north). The organization supports living-history programs statewide—including at Castillo de San Marcos and Fort Matanzas in St. Augustine—but its office is in Ormond Beach (Volusia County).
If you’re visiting St. Augustine sites, check their calendar for FLH-supported events (encampments, weapon demos, period cooking).