In order to update the FLM server, do the following:
Stop running FLM service: Close license server via Start/ Control panel/ Services/ CADENAS FLM (MASTER).
Remove service from Control Panel: Remove the service via Windows Start Menu -> Add or Remove Programs -> CADENAS FLM Server -> Uninstall.
Delete the files: You can now delete the files from the hard disk. The license should be backed up beforehand if it is still being used.