diff --git a/src/client/hooks/useAuth.ts b/src/client/hooks/useAuth.ts
index 313a047..cefb593 100644
--- a/src/client/hooks/useAuth.ts
+++ b/src/client/hooks/useAuth.ts
@@ -27,6 +27,7 @@ const useAuth = () => {
       const state = await serverFunctions.getAuthorizationState();
       setAuthState(state as AuthState);
       setAuthStatus('success');
+      await serverFunctions.refreshMenu();
     } catch (error) {
       console.log('Error getting auth data', error);
       setAuthStatus('error');
@@ -41,7 +42,9 @@ const useAuth = () => {
     analytics.trackLogout();
     try {
       await serverFunctions.resetOAuth();
-      setTimeout(getAuth, 500);
+      setTimeout(async () => {
+        await getAuth();
+      }, 500);
     } catch (error) {
       console.error('Error revoking OAuth:', error);
     }
diff --git a/src/server/index.ts b/src/server/index.ts
index 4525ecd..5e6a164 100644
--- a/src/server/index.ts
+++ b/src/server/index.ts
@@ -1,5 +1,7 @@
 import {
   onOpen,
+  onInstall,
+  refreshMenu,
   openCreateDiagramDialog,
   openEditDiagramDialog,
   openEditDiagramDialogWithUrl,
@@ -31,6 +33,8 @@ import {
 // Public functions must be exported as named exports
 export {
   onOpen,
+  onInstall,
+  refreshMenu,
   openCreateDiagramDialog,
   openEditDiagramDialog,
   openEditDiagramDialogWithUrl,
diff --git a/src/server/ui.js b/src/server/ui.js
index 2735b9b..fa32340 100644
--- a/src/server/ui.js
+++ b/src/server/ui.js
@@ -1,18 +1,43 @@
-export function onOpen() {
-  const menu = DocumentApp.getUi()
-    .createAddonMenu()
-    .addItem('Start', 'openSidebar')
-    .addSeparator()
-    .addItem('New diagram', 'openCreateDiagramDialog')
-    .addItem('Browse diagrams', 'openSelectDiagramDialog')
-    .addItem('Edit selected diagram', 'openEditDiagramDialog')
-    .addSeparator()
-    .addItem('About', 'openAboutDialog')
-    .addItem('Help', 'openHelpDialog');
-
+function buildMenu() {
+  const menu = DocumentApp.getUi().createAddonMenu();
+  
+  menu.addItem('Start', 'openSidebar');
+  
+  let authorized = false;
+  
+  try {
+    const authState = getAuthorizationState();
+    authorized = authState && authState.authorized;
+  } catch (e) {
+    console.log('Error checking authorization state: ' + e);
+    Logger.log('Auth check failed: ' + e);
+  }
+  
+  if (authorized) {
+    menu.addSeparator();
+    menu.addItem('New diagram', 'openCreateDiagramDialog');
+    menu.addItem('Browse diagrams', 'openSelectDiagramDialog');
+    menu.addItem('Edit selected diagram', 'openEditDiagramDialog');
+  }
+  
+  menu.addSeparator();
+  menu.addItem('About', 'openAboutDialog');
+  
   menu.addToUi();
 }
 
+export function onOpen(e) {
+  buildMenu();
+}
+
+export function onInstall(e) {
+  onOpen(e);
+}
+
+export function refreshMenu() {
+  buildMenu();
+}
+
 export function setBaseUrl(url) {
   try {
     const scriptProperties = PropertiesService.getScriptProperties();
@@ -128,11 +153,12 @@ export function openAboutDialog() {
   var ui = DocumentApp.getUi();
 
   var text =
-    'PlantUML Gizmo was written for use in the OO Analysis and Design courses at École de technologie supérieure, and has been used by Google Engineers on Android and Google Pay.\n\n' +
-    'It uses JavaScript API Client Code described at http://plantuml.sourceforge.net/codejavascript.html as well as inflating routines at http://www.planttext.com/javascript/jquery-plantuml/plantuml.js\n\n' +
-    'Find me on twitter @thefuhrmanator. Version 15 (2019-11-22)';
+    'Mermaid for Google Docs \n\n' +
+    'Publisher: Mermaid Chart Inc\n' +
+    'Mermaid for Google Docs brings flexible, collaborative diagramming directly into your documents. Create, insert, and edit diagrams without leaving Google Docs—using Markdown syntax, the Visual Editor, or Mermaid AI\n\n' +
+    'For detailed information, reviews, and marketplace details, visit the Google Workspace Marketplace.';
 
-  ui.alert('About', text, ui.ButtonSet.OK);
+  ui.alert('Add-on Information', text, ui.ButtonSet.OK);
 }
 
 export function openHelpDialog() {
@@ -155,6 +181,7 @@ export function handleCallback(callbackRequest) {
   var service = getOAuthService();
   var authorized = service.handleCallback(callbackRequest);
   if (authorized) {
+    refreshMenu();
     return HtmlService.createHtmlOutput(
       '<html><body>Success! You can close this window.<script>window.setTimeout(function() { google.script.host.close(); }, 1000);</script></body></html>'
     );