In the help there is a settings area - how to get to it? (image on user guide page - http://www.wisecleaner.com/wise-jetsearch-user-guide.html)
What does 'Run quick search' do?
The program window is a fixed size or full size - make it so you can resize the window to your liking.
The preset file specs (images, documents etc.) should be customizable - at the moment if you want to modify the preset it is too awkward (e.g. images has too many options, you then have to make lots of changes to it before searching!)
Make a setting to change the font size
When I open a document I have to confirm it every time - when I open the same document in File Explorer it opens without a confirmation.