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JUST CLICK AND DOWNLOAD (please, see the attached PDF).

First, click the folder to open it and then, click the score. 
At the top of the page, you'll have the option to "Download" it (click again).

The files are listed in alphabetical order, just the same as written in the website pages and menus 
(for example, Bach J.S., Bill Evans, etc.), and in the Library Catalog.

Then, please, search for the document names in the respective alphabetical folders. Some composers have specific folders.

It also is possible to make a search within the folders using the browser option "Find" (Ctrl+F) 
and typing any word or part of it (Rachmaninoff or Rachma, for example).

If the documents are not shown, please go to the folder's end (key "End" several times),
and then try again the search (Ctrl.+F).