Thanks.
Unfortunately, that is what I feared. Also, I read on other posts about using WeatherLink to look at the logger, but unfortunately too, my version of WeatherLink was originally Windows. Davis's upgrade for Mac will only install if you have the original Mac version installed.
For the future, maybe that should be a WeatherCat feature add, being able to directly query the logger history. I am no programmer, but it doesn't seem to a layman that it should be too difficult. I will stand corrected if I am wrong.