Trouble importing library from Papers

The instructions say “Go to the library folder and find the Files folder within it. Keep this Files folder open for the next step.” But my library folder for Papers 2 does not have a folder with that name.
Anyone successfully import from Papers 2? Any suggestions welcome

The best would be to use Spotlight to search for a PDF of a paper in your Papers2 library. The folder that Spotlight locates the PDF in must then be the folder where Papers2 stores its PDF files.