The site you are working with must already be checked out in order for the menu to be operational.

Clicking on the commands essentially executes that TortoiseSVN command on the file that's currently open in the editor.

In the site panel, right clicking on the file reveals a context menu called Subweaver that can be used to execute commands on the currently selected file or group of files.

A recent addition to the program is a command called Cloak SVN Directories. This command cloaks all of the .svn or _svn directories located in the current site. This feature was added by request to provide an easy way for users to prevent Dreamweaver from uploading the SVN directories to a production server.