Howto upgrade from the Windows Legacy Service.

  Garry: "The Windows-Legacy-Service is gone!"
  MacREADY: "Is there any way we can fix it?"
  Garry: "It's Gone MacREADY ...."

See: C:\Program Files\Openvpn\config-auto\readme.txt

Discussion: ​https://community.openvpn.net/openvpn/ticket/1344

Deprecation notice: ​https://community.openvpn.net/openvpn/wiki/DeprecatedOptions#Windows:openvpn-legacy-service

Disclaimer: This howto-by-wiscii may not be accurate.