I would also like to see that missing feature. However, there is a workaround for that problem. You can configure the Access-Controls in the Advanced-Options and set "Transfer-Files" to "After confirmation" (or set the whole Access-Controls to "Confirm all"). Now you have to confirm every switch of a folder and every transfer on the computer with the incoming connection. This is secure, but not very user-friendly. Also this will only work if somebody sitting in front of the remote-computer, of course.
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