If you are using DS 3 then your content shouldn't be in the application folder but in your documents folder, DAZ3dStudio 3Content as I recall. You can check this by going to Edit>Preferences>Directories, clicking at the top ("DAZ Studio Content Directories") and picking Poser Content Directories from the menu - any of the folders listed there will be OK to place the Runtime. Also, if you are using the content manager you will need to do a search to add the new files to the database, or to add them manually (in the Content palette, click the triangle button at top-right: if the tick is next to one of the View folders as options hit Esc to cancel, or click away from the menu, otherwise pick one of the View folders as options; you should now see entries for the folder(s) listed as Poser content directories in the palette in which you can locate the new items, as described in the readme, and you can right-click and choose to add them to a category so you can find them in the content manager).