Hi there,
Thanks for having a go at using my plugin.
There aren’t any setting here. This plugin is intended for use by developers who can integrate the fancy dropdowns into other parts of WordPress using code.
Examples of how to integrate this pluign with your own code are given here: https://www.ads-software.com/plugins/select2-post-selector/other_notes/
I suspect you probably want something much easier to use for related posts. Try some of the plugins listed in this search: https://www.ads-software.com/plugins/search.php?q=related+posts
If you still think you need help with THIS plugin then drop me another line with more detail about what you have done and where it’s going wrong, and I’ll see if I can help.
Thanks