Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
Sitemaps relatively easy to setup, follow these instructions...
This discussion is related to the Sitemaps
1) extract plug-in to plugins folder.
2) Point to /plugin/sitemaps/build in a browser
3) Check in cache that there is a sitemaps folder, and there are some sitemaps files in it.
4) In dashboard create a route expression: sitemap.([^\.]+).xml, target: cache/sitemaps/sitemap.$1.xml, type:internal.
You can view the site map index at /sitemaps.$1.xml, it list the sitemap location, which you can view also.