diff --git a/apps/common/main/lib/controller/Desktop.js b/apps/common/main/lib/controller/Desktop.js
index b6a03bbed9..1d7fdfd37e 100644
--- a/apps/common/main/lib/controller/Desktop.js
+++ b/apps/common/main/lib/controller/Desktop.js
@@ -60,10 +60,12 @@ define([
             'btn-save-coauth': 'coauth',
             'btn-synch': 'synch' };
 
-        var is_win_xp = window.RendererProcessVariable && window.RendererProcessVariable.os === 'winxp';
+        var nativevars;
 
         if ( !!native ) {
             native.features = native.features || {};
+            nativevars = window.RendererProcessVariable;
+
             window.on_native_message = function (cmd, param) {
                 if (/^style:change/.test(cmd)) {
                     var obj = JSON.parse(param);
@@ -207,6 +209,8 @@ define([
                 _.extend(config, opts);
 
                 if ( config.isDesktopApp ) {
+                    let is_win_xp = nativevars && nativevars.os === 'winxp';
+
                     Common.UI.Themes.setAvailable(!is_win_xp);
                     Common.NotificationCenter.on('app:ready', function (opts) {
                         _.extend(config, opts);
diff --git a/apps/documenteditor/main/app/view/FileMenuPanels.js b/apps/documenteditor/main/app/view/FileMenuPanels.js
index caa4bb7108..9efe54cac9 100644
--- a/apps/documenteditor/main/app/view/FileMenuPanels.js
+++ b/apps/documenteditor/main/app/view/FileMenuPanels.js
@@ -2088,12 +2088,12 @@ define([
                             store.fetch(config);
                         } else {
                             if ( Common.Controllers.Desktop.isActive() ) {
-                                if ( store.contentLang === '{{DEFAULT_LANG}}' )
+                                if ( store.contentLang === '{{DEFAULT_LANG}}' || !Common.Controllers.Desktop.helpUrl() )
                                     me.iFrame.src = '../../common/main/resources/help/download.html';
                                 else {
                                     store.contentLang = store.contentLang === lang ? '{{DEFAULT_LANG}}' : lang;
-                                    me.urlPref = `${Common.Controllers.Desktop.helpUrl()}/${lang}/`;
-                                    store.url = `${me.urlPref}/Contents.json`;
+                                    me.urlPref = Common.Controllers.Desktop.helpUrl() + '/' + lang + '/';
+                                    store.url = me.urlPref + '/Contents.json';
                                     store.fetch(config);
                                 }
                             } else {