private Preferences preferences = Preferences.userNodeForPackage( NtrViewer.class );
public AboutDialog() {
String version = preferences.get("version","0.01");
BorderContainer mainPane = new BorderContainer();
mainPane.setDefaultLayout( new LayoutInfo(LayoutInfo.CENTER, LayoutInfo.NONE, new Insets(5,5,5,5), null));
String htmlText = "<html><body>" +
"<span style=\"font-size:110%; text-decoration: underline;\">NtrViewer v. " + version + "</span><br><br>" +
"NtrViewer is a part of<br>" +
"a parallel programming<br>" +
"language Parus.<br><br>" +