Last version of TOAD 5.7.605.
Open it and with Web Page opened, empty combobox of URL in toolbar.
After this press green button - Open a Page in a Web Broswer -then press button - Stop the web browser from retrieving link - and after this press button - Add the current page to The Project Manager.
At this point I obtain the error message that you can see in attach to this message.
Best regards.
Sergio Bertolotti