I've got both Dreambox Control Center 2.96 and DCC_E2 v1.46 and they both connect to my Vu Solo and ET 10000 box, I do run them in Windows 7 compatability mode.
Yes there are issues in that they both seem to not change the cursor from the busy spinning circle but they both work but there are 2 things to note, both of which I work around. First is that for me that if you disconnect and then reconnect the FTP won't sometimes connect, telnet does connect though. The other is that they won't terminate so have to killed using Task Manager. As I said I just work around these issues.
If you want FTP and Telnet then you can always use Putty or AnyConnect? So there are ways around if you look around but to me it's hardly a reason to abandon an image because some 3rd party tool which is no longer being updated stops working.