A trick I used that still worked after this Defender update (tested some months ago) is replacing Magnify.exe with ftp.exe. This does not make Defender suspicipus, but one can open Magnify.exe from the lock screen and one can execute commands from within the ftp.exe shell by prefixing them with !. This is great, because ftp.exe binary is signed by Microsoft and is a completely legit binary (: