On the bottom right the Internet Explore Active X compoent has been added.

Whenever you select a node on the treeview or you type a URL in the top left panel the IE location is changed accordingly. This will insure you have typed the correct URL.

You may use the IE control to navigate and then click the button to copy the link into the URL field.

The simplest way to do it is to select a directory node, click the right mouse button and either choose Read from File or Save to File

You may want to save a subtree to a file, e.g. Search Engines, and load it into as the subtree of another browsing tree

As a side effect of saving to a file , the directory URL will be set to the newly created file