Provides a sidebar widget containing links to posts with a similar set of tags to the current post.
How can I hide the datestamps next to the related posts?
In the widget settings, set the date format to blank.
How can I show the list at the end of posts (in RSS or on single pages) without having the widget in my sidebar?
Put the widget in your sidebar, check the checkbox for adding the list to the end of the post (or in the RSS feed), click 'Done', and then save your widget changes. When the page reloads, remove the widget from the sidebar and save the changes.