Dear N4KHQ, X-Air and WeatherCat troubleshooters,
If it continues to fail I think I will replace the WC preferences. Any tips on the best way to replace the preferences? Thanks
If you have some sort of backup system like Time Machine, you might try finding an earlier copy of the preferences. I couldn't easily see if you had upgraded to WeatherCat 3 or not. If not, you might try to see if you have a WeatherCat preference file from before this problem started. Simply replacing the file with a backup is much simpler.
Because preferences files are at a much greater risk of becoming corrupted because of a caching scheme implemented in macOS, some of us have gotten into the habit of making explicit backup copies of the main WeatherCat preferences files to avoid this sort of problem.
Cheers, Edouard