Here's the tutorial for creating XML sitemaps specificly
(linked at other page as well, but maybe you did not see it?)
http://www.microsystools.com/products/sitemap-generator/help/xml-sitemap-generator-tutorial/It really just is to type in your website address and hit the "start scan" button
If you want to create a different type of sitemap, just check the relevant tutorial.
If you have advanced needs, you can switch off "Easy mode" in A1 Sitemap Generator which will give you access to the full range of options. But for the majority of users that should not be necessary.
If you need help with anything, please feel free to ask
