That folder is labeled 'Poser 13 Content' and should appear as a separate runtime in your Poser Library.  There are 3 other associated folders, 'Downloads', 'Included", and 'Purchased'; check those folders for misplaced content before submitting a support ticket.  There is nothing wrong with the old, conventional installation method, I still do that myself.  Conduct a disk search to verify the installation and location.