I may be mistaken, but I think the display of these special characters is based on the font you are using.
I have MEW 9.10.4 installed on a Windows 2000 Professional system and created a text file using the hex 93 & 94 characters and do indeed see the special left and right quote marks (slanted instead of vertical).
I am using the an ANSI “Courier New” 9pt and those characters seem to display correctly.
You can use the “Tools” -> “Ascii table” to select various fonts and see the results to see which font renders your special characters in the correct manner. Click on the OEM/Ansi buttons to select the OEM or ANSI version of a font type to see the results.