Menu items hide conflicting items when made visible.

src/browser/application-menu.coffee

@@ -71,16 +71,28 @@ class ApplicationMenu
 
   # Toggles Install Update Item
   showInstallUpdateItem: (visible=true) ->
+    if visible
+      @showDownloadingUpdateItem(false)
+      @showCheckForUpdateItem(false)
+
     if (item = _.find(@flattenMenuItems(@menu), (i) -> i.label == 'Restart and Install Update'))
       item.visible = visible
 
   # Toggles Downloading Update Item
   showDownloadingUpdateItem: (visible=true) ->
+    if visible
+      @showInstallUpdateItem(false)
+      @showCheckForUpdateItem(false)
+
     if (item = _.find(@flattenMenuItems(@menu), (i) -> i.label == 'Downloading Update'))
       item.visible = visible
 
   # Toggles Check For Update Item
   showCheckForUpdateItem: (visible=true) ->
+    if visible
+      @showDownloadingUpdateItem(false)
+      @showInstallUpdateItem(false)
+
     if (item = _.find(@flattenMenuItems(@menu), (i) -> i.label == 'Check for Update'))
       item.visible = visible
 

src/browser/atom-application.coffee

@@ -138,25 +138,17 @@ class AtomApplication
       @applicationMenu.showCheckForUpdateItem(false)
 
     autoUpdater.on 'update-not-available', =>
-      @applicationMenu.showDownloadingUpdateItem(false)
-      @applicationMenu.showInstallUpdateItem(false)
       @applicationMenu.showCheckForUpdateItem(true)
 
     autoUpdater.on 'update-available', =>
       @applicationMenu.showDownloadingUpdateItem(true)
-      @applicationMenu.showInstallUpdateItem(false)
-      @applicationMenu.showCheckForUpdateItem(false)
 
     autoUpdater.on 'update-downloaded', (event, releaseNotes, releaseName, releaseDate, releaseURL) =>
       atomWindow.sendCommand('window:update-available', [releaseName, releaseNotes]) for atomWindow in @windows
-      @applicationMenu.showDownloadingUpdateItem(false)
       @applicationMenu.showInstallUpdateItem(true)
-      @applicationMenu.showCheckForUpdateItem(false)
       @updateVersion = releaseName
 
     autoUpdater.on 'error', (event, message) =>
-      @applicationMenu.showDownloadingUpdateItem(false)
-      @applicationMenu.showInstallUpdateItem(false)
       @applicationMenu.showCheckForUpdateItem(true)
 
     # Check for update after Atom has fully started and the menus are created