Get rid of the 'Show all results at once' checkbox; it's useless...
Add a menu strip with buttons 'Settings', 'Exit' and 'About'. Only 'Exit' is implemented atm
Implement a settings class as well as a settings form with so far only one setting to determine whether or not the user wants to be prompted if he's sure he wants to open the selected file or not
Implement a setting whether or not the user wants to be prompted about expanding the progress bar or not
Implement a setting whether or not the user wants to be prompted about exiting the application or not
Implement a setting if you want to auto save settings without being prompted about it everytime