The files are listed in alphabetical order, which is chronological order, so the most recent file is at the bottom of the list.
To download a file, click the arrow at right of the line with the file name.
To read a file online, hold CTRL and click on the file name. The file will go to a new window and the tabs at top of the screen can be used to switch between this page and that one. If you just click without the CTRL, the newsletter will replace this page in the current window and you will need to re-enter the page URL to return to this page.