Comment on SecureFiles

The disk images created by SecureFiles don't have the ".dmg" extension. The extension is ".sparseimage". Why is that? I'm currently using FreeDMG for this purprose and it creates disk images with the ".dmg" extension. (Maybe the developer could explain.)
And there's something else... Everytime you launch SecureFiles to create a disk image, you have to specify the location. I think the application should remember the previous settings everytime it is launched.