find box disappears when main winscp explorer window is closed

Hi - simple bug in version windows 5.7.6 (Build 5874) and the one before:

Using the norton interface - when I have a file window open and the find box up, the find box disappears when I minimise the winscp main window. The find box will not reappear until the main window is again visible.
It is the minimising action, rather than the window being visible, that makes the find box disappear.

Took a while to find that out!

The Find dialog is modal. You cannot minimize a window (the main window) that has a modal dialog on top of it. How do you minimize it?