949 - New "File extensions for individual opening per file" option

[Free4all]

v949 has a new setting "File/folder operations" -> "Open multiple files" -> "File extensions for individual opening per file".

By the name of it, I'm guessing it's supposed to open a separate instance of the associated application for the specified file extensions. Is that guess correct, or does it serve a different function?

I tried it with file extensions associated with Notepad++, but only a single instance of Notepad++ opened with all the selected files in it.

I also tried it with file extensions associated with XnView MP, but only a single instance of XnView MP opened with only 1 of the selected files in it.

What's the setting supposed to do? Is it working correctly?

[Dreamer]

Same here, with txt files and PSPad.

949, WIndows 10.