As far as I know ECAD doesn’t support the Fritzing format (probably due to breadboard view but I don’t know.) A couple of folks in the past have asked about it and been told to ask the ECAD folks but I haven’t ever seen a follow up. So you would likely need to make a custom part (or get one of us to make one for you.) There are some molex connectors in generic headers but possibly not this particular one. A quick google search for
fritzing part molex 0430450401
doesn’t turn up a part either. There doesn’t appear to be a dual row molex available in the generic connector either so I would guess you are at a custom part.
clicking on messages on the top line brings up the New message icon on the left side, clicking that sends a message. I’d expect the forum to act the same for you. This is Windows 10 under firefox, variations in OS or browser may cause changes but I wouldn’t expect so.