I downloaded xmltv from source forge and unzipped it in the MC18 folder. Now I'm trying to find the instructions on how to set it up.
This option is provided for people in some other countries - people who have to rely on getting guide data from a different source. It will work for you too, but the first option is far better (see below).
When you choose this option, the next step asks you to enter either an executable file name, or an xml file name. The former is used if you have a third-party program that can be executed and will download the data for you. The latter is used if you manually downloaded the xml file into some folder (or you setup a third-party program to automatically download the xml file into that folder for you).
The recommended choice appears to require choosing a service provider. Since we are using OTA and not a service provider then it doesn't appear that I can use that option.
Suggestions?
Even though it asks you to choose a "service provider", one of the "service providers" should be "Digital Terrestrial Lineup". That is what you should choose. This is far better than other options. You just need to choose "United States" for country, and enter your zip code for postal code.