I went to this page: Synergy

Which leads to the three downloads:

Unfortunately..
The first, obviously is not broadcast.
The second - is the built binary .EXE's only.
The third - includes a visual studio .dsw, but the launcher->Resource (.RC) file->IDD_HOTKEY_ACTION dialog does not include the broadcast checkbox available in the pc built binary. So it appears to be out of date software or the incorrect version.

I'm happy with the synergy with broadcast for the most part(excluding some crashes). Essentially my problem is that the broadcasting option is simply a toggle, and although it can be embedded between commands in a keystroke, it does not appear to respect toggling off and on.

i.e. I would like the ability to broadcast only certain keys, while not broadcasting other keys, while also able to send specific keys to specific computers - without needing to use the toggle. I can accomplish that if the broadcast toggle switch were upgraded... or could accomplish it by modifying the source if it were available. I'd rather not reinvent the original broadcast work.