We should be able to help you get this resolved and running. I am not immediately sure what might be causing what you are describing, so first I have a few questions for you.
What version of the ThingWorx Manufacturing Apps did you install? Was it the Express install, or the Dev Kit install?
Was any version of either ThingWorx or the Manufacturing Apps previously installed on this PC?
What is the rest of the URL you are seeing (before the 'LoginRedirect')?