Screenshots at SourceForge's

SourceForge.net now offers to feature to add screenshots directly to a projects SF.net page (not its homepage, see https://sourceforge.net/docman/display_doc.php?docid=25493&group_id=1 for details). So I decided adding the AppLaunch main window, so that users can see if, the program is what they expected by searching for AppLaunch.