Hey folks,
It appears that the NDI VLC plugin no longer works in 6.0.7. I rolled back to 6.0.6 and all is working as expected.
In 6.0.7, it doesn't see the NDI source. This is on Windows 10.
Also, as a side note, Newtek is rolling out the 3.5 update soon for NDI Tools. It will now support VLC 3.0.