Thanks for your feedback.
No hidden folders anymore!
I used the copy (context menu in WinSCP) and paste (context menu in Windows) and it seems that WinSCP now have created a hidden folder (scp43666) where i pasted the file. Why is this needed and why is it not deleted when the copy is finished? It seems to create a new folder for every file i paste. I don't want to have empty hidden folders everywhere because i have hidden files visible so i will see these folders.
WinSCP 5.16 Dev build 9651 2019-06-28