TortoiseSVN is a Windows shell extension for Subversion.
Enterprise Architect cannot use TortoiseSVN to communicate with the Subversion server; it must use the Subversion command line client.
TortoiseSVN provides icon overlays in Windows Explorer that are useful as a tool for observing the status of your Subversion controlled files. It enables you to create your repository sub-trees and check out local working copies from within Windows Explorer using simple menu commands.
You can download TortoiseSVN from: http://www.tortoisesvn.tigris.org/.