Intuitive syntax for wfn: (wholefilename:)

[Stamimail]

"Windows" (double quotes)
""Program Files"" (double double quotes)

If you plan using variables, you will consider double double quotes also for filenames that don't have a space.
""Windows""

[void]

Everything uses double quotes (") to escape spaces and operators.

There's a match_whole_words_when_using_quotes ini setting that will match whole words when using double quotes.

This might help with matching your exact filenames.

To enable match_whole_words_when_using_quotes:

• Copy and paste the following into your Everything search box:
  /match_whole_words_when_using_quotes=1
• Press ENTER in your Everything search box.
• If successful, match_whole_words_when_using_quotes=1 is shown in the status bar for a few seconds.

I will consider options to match the whole filename and the option to use double double quotes ("")
Thank you for the suggestions.