The configuration for the 'Presets' is stored in the file:
C:\Program Files\Mythicsoft\FileLocator Pro\config\file_preset.xml
You can edit the file but changes may be overwritten if you update FileLocator Pro. In future they'll be a separate 'user' configuration option to edit those settings.
The text associated with the preset is pulled from the lang-XX.xml file, e.g. lang-en.xml.
<res id="nn" text="criteria's name" />
<res id="mm" text=" help text" />
where nn and mm are the numbers specified in file_preset.xml file:
<langid>nn</langid>
<helpid>mm</helpid>