I have found that you may need to use a couple of different sites to see all of the available free TV stations. Here are the three that I used.

http://www.tvfind.us/

https://www.tablotv.com/tools/

http://www.receptionmaps.com/Advanced-TV-Maps.html


When you are at the checkout line and they ask if you found everything say "Why, are you hiding stuff?"

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware