The issue is that there is no triangle to expand further than My Documents. I cannot go down any further because Minion does not give the option. How can I point it to the correct file? See the attached screenshot.
Book1.pdf
As to where it is installed, it is the default installation. C: drive, and the addon folder is in the usual place.
Also, note in the screenshot that the "Update All" button appears to have some other text in it that "update all" is written over.