DefaultOption When Overwriting File

When I'm asked to confirm that I want to over-write a file on upload, the "YES" option is highlighted.

This seems a little dangerous, seems sensible to have "NO" or "CANCEL" as the default?

I'm running WinSCP 4.0.5 on WinXP SP2.

Well I do not consider it that dangerous. I believe that it would be inconvenient to have No as default. If you do not like it, you can at least setup remote recycle bin.