The file manager may be accessed through the main control panel menu by clicking on the "File Manager" icon. A link to the file manager is also located at the bottom-left corner of the screen.
Navigating through folders is accomplished by clicking on the folder name or the folder icon (to the left of the folder name). For example, clicking the "domains" link (or folder icon) will bring us to a screen that looks like this:
You can always return to the previous directory by clicking "../ Up a Level" link. The "File Manager" link at the bottom-left corner of the screen will always return you to the highest possible directory.