I discovered this demo after my friend had used the online version to create a world for me after I'd asked his help in a bit of world building. Then I joined this site and found the odd post or two mentioning this program. There is both a web version and a downloadable demo version and this tutorial covers the basics of the downloadable demo version. The tutorial is a pdf with images and links to the creator's site.

I hope you find this of some use.

tut-worldbuilderdemo.zip

The attached file is a Windows compressed zip file so, after downloading, right click it then click Extract All... The only thing in the compressed file is the pdf tutorial.