This window helps you to select or enter directly the mask to include / exclude files to / from your project.
You can enter multiple masks divided by ';' (semicolon) as one mask.
Use Save as Filter button to be able to enter this filter quickly next time you need it for another mask.
Controls in this window:
|Save as filter|
|Select by filter|
|Select by file name|
The PRO version also has the Date, Size and Attribute buttons, allowing you to select files by the corresponding criteria.