Abnormal absence of tree structure in left side of "Preferences Dialog"

Also there is no tree structure in local or remote windows pane. The mystery thing is that I was able to move the cursor in the blank left side of "Preferences Dialog" and it did react to the invisible tree. And I was able to drag and drop the files but I could not see them anywhere.
Except in PuTTY ...
I am running latest version Mint, I did not try a new install of WinSCP..
I am a horrible Linux user and WinsCP is opened on Wine.
I did manage to avoid some problems and I think I did drag the scriptmap to the remote Asus router. The kids are claiming the PC now I will make printscreens of the alien event.

Update I did reinstall WinSCP .... and it did not help.

Thanks for your report. Though you should report this to the Wine project instead.