content: 
  package com.japisoft.editix.update;
  
  import com.japisoft.editix.main.EditixApplicationModel;
  import com.japisoft.framework.ApplicationModel;
  import com.japisoft.framework.preferences.Preferences;
  import com.japisoft.framework.ui.toolkit.BrowserCaller;
  
  /**
  This program is available under two licenses : 
  
  1. For non commercial usage : 
  
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  2. For commercial usage :
  
  You need to get a commercial license for source usage at : 
  
  http://www.editix.com/buy.html
  
  Copyright (c) 2018 Alexandre Brillant - JAPISOFT SARL - http://www.japisoft.com
  
  @author Alexandre Brillant - abrillant@japisoft.com
  @author JAPISOFT SARL - http://www.japisoft.com
  
  */
  public class UpdateManager {
  
  		static {
  
  			if ( EditixApplicationModel.MAJOR_VERSION == 6 ) {
  				if ( "false".equals( Preferences.getPreference( "system", "update6.1", "false" ) ) ) {
  					System.out.println( "Update default browser" );
  					if ( !ApplicationModel.isOtherPlatform() ) {
  						Preferences.getPreference( "viewer", "html", "firefox" );
  					}
  					Preferences.setPreference( "system", "update6.1", "true" );
  				}
  			}
  
  			if ( EditixApplicationModel.MAJOR_VERSION == 6 ) {
  				
  				if ( "false".equals( Preferences.getPreference( "system", "update6.2", "false" ) ) ) {
  					System.out.println( "Update default browser" );
  
  					if ( ApplicationModel.isWindowsPlatform() ) {
  						Preferences.setPreference( "viewer", "html", BrowserCaller.WIN_PATH + " " + BrowserCaller.WIN_FLAG  );
  					} else
  					if ( ApplicationModel.isMacOSXPlatform() ) {
  						Preferences.setPreference( "viewer", "html", BrowserCaller.MAC_PATH );
  					} else
  					if ( ApplicationModel.isOtherPlatform() ) {
  						Preferences.setPreference( "viewer", "html", BrowserCaller.UNIX_PATH );						
  					}
  
  					Preferences.setPreference( "system", "update6.2", "true" );
  				}
  
  			}			
  		}
  
  		static void updateForANewVersion( int major, int minor ) {
  			// Remove all dialogs location
  			Preferences.removeAllPreferencesForType( Preferences.RECTANGLE );
  			EditixApplicationModel.debug( "Update for release " + major + " . " + minor );
  			
  			if ( major > 5 || ( major == 5 && minor >= 1 ) ) {
  				Preferences.removePreference( "xslt", "parameter" );
  			}			
  		}
  
  }
  