I've been using WinSCP for about 2 years now and yet to see this feature working. Almost everything about this program is great except this one most important thing. It still cannot resume transfers. Why? I don't know. I even written a program myself to keep track of its "resume transfer" dialog (whenever it pops up) and sends a WM_CLOSE to the dialog to help it resume the transfers. I don't know why it still cannot do that by itself. I'm using 4.3.6 right now. I tried to upgrade to 5.0.5 but it made things worse (not to mention resume transfers were not working again).