Plex for Windows used to work with SVP 4 for me, but I had to reinstall Windows from scratch. And now I can't seem to get Plex for Windows to work with SVP 4 anymore for some reason. I have followed the instructions for installation, and it works with MPC-HC and VLC, but not with Plex for Windows.
I haven't installed Plex Media Player though, since they are not updating that anymore.