This is because you're on Windows, which doesn't support Syphon like the Mac.
Check out the Mercury Transmit section here: https://youtu.be/N-_nwpSkuGE?t=25m10s
There's also a guy who wrote some code to have NDI work with OBS: GitHub - Palakis/obs-ndi: Network A/V in OBS Studio
how do I contact you 'Dave' directly....I know this is on someone else questions but I am in desperate need for help....thank you!!
Got your DM, I'll follow up.