How to move FDLAUNCHERRORLOG from one location to another in SQL 2008

If you have migrated your Database\Instance or if the drive holding the SQLdata has been decommissioned, then in those scenarios how do you move the SQL Full-text Filter Daemon Service Error Log (FDLAUNCHERRORLOG) from one location to another in SQL 2008.   “SQL Server Fulltext Filter Daemon Launcher” service will  be up and running even…