Hello @Jeremy_Schmitz,
Just to verify here, you have added Roon as an exception to your Windows Firewall settings as per these instructions? I am wondering if a Windows Update changed those settings without your knowledge as it did for other users, please look over that thread.
I would also make sure that your Wireless router is not part of the list of routers that need special settings applied to it. Please let me know if that helps.
Thanks,
Noris