Open in JavaScript Editor. Same as double-clicking the file - it opens it for editing.
Change site. Opens the Manage Websites dialog, allowing you to select a different site to display in the Project pane.
Refresh. Updates the listing of files and folders.
Open. Opens the file in the associated application.
Delete. Removes the file.
Properties. Opens the File Properties dialog.
Get. Downloads the file from the internet and replaces the file on your computer with the downloaded version.
Put. Uploads the selected file to the Internet.