Loewchen for the win! That's what it was! I had to get off of Steam and install the older version (thanks for the link) to make it work. They need to fix that ASAP for the new Switch folks.

Thanks again Loewchen!

Have played Factorio on PC for years... just got the Switch copy of Factorio so the Mrs can play too.

Neither the Switch nor the PC can see the other.... Tried LAN connection and Public... nothing. Not sure what I'm doing wrong. Need help, please!