diff --git a/app/Application.js b/app/Application.js
index 5c8ba338..645b7c49 100644
--- a/app/Application.js
+++ b/app/Application.js
@@ -205,76 +205,6 @@ Ext.define('Rambox.Application', {
 			Ext.cq1('app-main').getController().showLockWindow();
 		}
 
-		// Synchronization problem in version 0.5.3 steps to fix it
-		if ( localStorage.getItem('id_token') && localStorage.getItem('refresh_token') === null ) {
-			var win = Ext.create('Ext.window.Window', {
-				 title: 'Backup your services'
-				,autoShow: true
-				,modal: true
-				,closable: false
-				,resizable: false
-				,bodyPadding: '0 15 15 15'
-				,width: 500
-				,layout: 'card'
-				,items: [
-					{
-						 xtype: 'container'
-						,html: '<h1>Synchronization problem fixed!</h1>In previous version, we had a bug that backing up your services throw an error. Now is fixed, but you will need to follow two simple steps to make it work.<br><br>If you decide not to do it now, you can cancel but it will ask you again next time you open Rambox until you do it.'
-					}
-					,{
-						 xtype: 'container'
-						,html: '<h1>Login again</h1>Just click the "Sign in" button at the bottom-right of this window to sign in again with the same account you used before.'
-					}
-					,{
-						 xtype: 'container'
-						,html: '<h1>Backup</h1>To finish, click the "Sync!" button to backup your current services and that\'s all!'
-					}
-				]
-				,buttons: [
-					{
-						 text: locale['button[1]']
-						,ui: 'decline'
-						,handler: function() {
-							win.close();
-						}
-					}
-					,'->'
-					,{
-						 text: 'Start'
-						,handler: function(btn) {
-							btn.hide();
-							btn.nextSibling('#signin').show();
-							win.getLayout().setActiveItem(1);
-						}
-					}
-					,{
-						 text: 'Sign in'
-						,itemId: 'signin'
- 						,hidden: true
-						,handler: function(btn) {
-							Rambox.ux.Auth0.backupCurrent = true;
-							Rambox.ux.Auth0.login();
-							Ext.defer(Rambox.ux.Auth0.logout, 1000);
-							btn.hide();
-							btn.nextSibling('#sync').show();
-							win.getLayout().setActiveItem(2);
-						}
-					}
-					,{
-						 text: 'Sync!'
-						,itemId: 'sync'
-						,hidden: true
-						,handler: function() {
-							Rambox.ux.Auth0.backupConfiguration(function() {
-								win.close();
-								Rambox.ux.Auth0.backupCurrent = false;
-							});
-						}
-					}
-				]
-			});
-		}
-
 		// Remove spinner
 		Ext.get('spinner').destroy();
 	}