I know exactly what you mean, Dave. I've had it for quite some time, along with the updates and add-ons etc to date, and it was just so much (more than I wanted, to be honest) that I simply read about how to set up the options page - which isn't that difficult - and then made sure the "Download at startup" thing was off, chose my basic needs and a weather station/ICAO code and since then whenever I've used it, I have let it make a random theme.
Always turns out really well (and you can save a randomly created theme if you really like it) and looks great.
I still have no idea about the depth of possibilities, but I'm happy with it.
One minor irritation is the various screens are often slightly too small for the text that is on them - so I can't always read the stuff and have to use some guesswork now and then. Bad form, that, for such a program. I had the same issue with the older version.
Here are some pics I took a while ago...
