// At this point it is clear, whether the update-Package is installed or not.
// If it is installed, it is also clear, in which version it is installed.
// Therefore the following dialog is also defined.
if ( data.newerVersionExists() ) {
// This can happen only in installation with user privileges.
// Installations with root privileges have cancelled installation
// already at first dialog.
// Possibility to select a new directory, in which no
// newer product exists