To view the latest files for a stream select it in the tree within the Administration view or the Repository view. The list will show all the files and folders at the root of the stream.
Right-clicking a file will give the menus for 'Show History' and 'Show Annotated History'. Both of these are explained in the PureCM User Guide.
Double-clicking a file or selecting the 'Open' menu will open a read-only editor with the file contents.
Selecting 'Save As' will allow you to save the latest version of the file locally.