Cut and paste of a ["] works.  Typing a double quote on the keyboard yields [“] (but the right version, not the left/open version as shown here).

I’m having trouble with search and replace and double quotes.  The file has regular (ASCII) double quotes.  Typing a double quote in the search and replace box yields the fancy unicode right-double-quote (two apostrophes) - which of course is never found.  I need some way to type ASCII in the search and replace box ...