while WinSCP is getting better and better there's one thing that bugs me:
the internal editor always opens in "window mode" and not maximized, even if I maximize it and close it afterwards.
There's always a gap the size of the titlebar of the WinSCP main window above the editor window.
So often I click in the left upper corner area to close the editor and instead this brings the WinSCP main window to the front.
Maybe you could make WinSCP remember the size/state of the editor window when it was closed?