I added “Tree View” to the Widget options with the ability to show the Widget on pages with multiple Posts. This new option displays links to related post under a subheading for the Tag or Category that it is related by. It also features a multi layered loop that dynamically removed duplicate Post Links and auto balances the remaining link so the Widget shows a relatively equal amount of Post Links under each Tag or Category. So, download version 1.2.01.04 and use the Widget on pages that have multiple Posts.
There was a bug in my loop that caused it to continue indefinitely if only one post was displayed. So I fixed it and released version 1.2.01.09 with the fixed loop.