You can open the files with cfd extension that haven't been downloaded completely in the Thunderbolt directory, where 5 is c:\TDdownload (default), and you can see its website address. You can leave me a message if you can't find it.

Are you looking for the one that has been downloaded? In this case, you should open it in Thunderbolt directory c: \ program files \ thundernetwork \ thunderbolt (default) in history.dat, and you can see the URL with notepad.