Ultimately I ended up going a different route. Locast seemed problematic for two reasons, first was that I'd have to monkey with the location. I did actually get that to work and it seemed like the browser extension mentioned, worked as advertised, which was great. Second though was that I'd have to pay a monthly fee (donation) and I was seeing where at the low end of $5/mo, people were still getting hit with the paywall later in the month. I know that Locast revised their paywall settings some because of corona, but I didn't really want to build something around a process that could revert back to a problem.
Instead, since I currently already run Plex for my locally stored media, and already pay for a Plex Pass, I figured I would leverage the Plex DVR feature and just buy a good antenna that could be mounted in my attic. I spent about $35 on Amazon for an RCA antenna and it works perfectly. I just routed the cable through my attic to the Hauppauge tuner and attached it to my Plex server and it was completely plug and play, no config needed. In the end, it's not really any different than using the Channels DVR for accessing some recordings and then the HBO Max app to access other shows. We'll just use Plex for accessing the CW shows (at least, that's how I'm trying to explain it to my wife lol).