How do you find all files that do not contain a particular string in their name?

Hi there,
I am trying to use the Find File tool to find all the files that do not contain a particular string "wlt" but it
always lists all files.
The screen shot shows you what I am using.
Help Please.
Thanks.
Regards,
David

dopus_No Match

Try

Thank you.
I thought I had tried that.but no.
Regards,
David

You can also use ~(*wlt*) in Find > Simple, the filter bar, etc. (as well as with Find > Advanced and a Name Match, although using No Match and *wlt* as above is probably easier there).