Christian --
Your first link is broken, but it doesn't matter.
I decided to risk the $99, and ordered it. It works OK.
For anybody contemplating a USB TAP debugger, you set it up by selecting Edit (target) Settings Remote Debugging Connection, where (target) is the name of your project, as selected in Project Set Default Target.
DO NOT use Edit Preferences Remote Connections They offer the same choices, but only the first one actually does anything useful.