diff --git a/.gitignore b/.gitignore
index a954433..3ac9048 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,5 +5,5 @@ Thumbs.db
 *.log
 *.autogenerated
 # ignore dist folder that has the installers for various platforms
-/app
+/bundle
 /dist
diff --git a/make.js b/make.js
index 5677cff..8eb731c 100644
--- a/make.js
+++ b/make.js
@@ -2,17 +2,18 @@
 var b = require('substance-bundler')
 
 function _copyAssets() {
-  b.copy('./src', './app')
-  b.copy('./node_modules/stencila/build', './app/lib/stencila')
+  b.copy('./src', './bundle')
+  b.copy('./package.json', './bundle/package.json')
+  b.copy('./node_modules/stencila/build', './bundle/lib/stencila')
 }
 
 b.task('clean', () => {
-  b.rm('app')
+  b.rm('bundle')
+  b.rm('dist')
 })
 
 b.task('assets', () => {
   _copyAssets()
 })
 
-b.task('cleanbuild', [ 'clean', 'assets' ])
-b.task('default', [ 'assets' ])
+b.task('default', [ 'clean', 'assets' ])
diff --git a/package.json b/package.json
index 55d76ef..8680984 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,8 @@
 {
   "name": "stencila-desktop",
-  "productName": "Stencila Desktop",
+  "productName": "Stencila",
   "description": "Stencila for the desktop",
-  "version": "0.26.0",
+  "version": "0.27.0",
   "author": "Nokome Bentley",
   "homepage": "http://stenci.la",
   "repository": {
@@ -13,11 +13,11 @@
     "url": "https://github.com/stencila/desktop/issues"
   },
   "license": "Apache-2.0",
-  "main": "app/main.js",
+  "main": "./bundle/main.js",
   "build": {
     "appId": "com.stencila.stencila-desktop",
     "files": [
-      "app/**/*",
+      "bundle/**/*",
       "node_modules/**/*",
       "package.json"
     ],
@@ -33,14 +33,14 @@
     "start": "node make && npm-run-all --parallel watch app"
   },
   "dependencies": {
-    "stencila": "^0.26.3",
-    "stencila-node": "^0.26.2"
+    "stencila": "0.27.4",
+    "stencila-node": "0.27.0"
   },
   "devDependencies": {
     "npm-run-all": "^3.1.0",
     "extract-zip": "=1.6.0",
-    "electron": "1.6.2",
-    "electron-builder": "^14.5.2",
+    "electron": "1.6.11",
+    "electron-builder": "19.13.0",
     "source-map-support": "^0.4.11",
     "substance-bundler": "^0.15.2"
   }
diff --git a/src/dashboard.html b/src/dashboard.html
index b364efa..1697c89 100644
--- a/src/dashboard.html
+++ b/src/dashboard.html
@@ -5,13 +5,13 @@
   <title>Stencila Desktop - Your documents</title>
   <link href="./lib/stencila/stencila.css" rel="stylesheet" type="text/css">
   <script type="text/javascript" src="./lib/stencila/lib/substance.js"></script>
-  <script type="text/javascript" src="./lib/stencila/lib/substance-mini.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/brace.min.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/d3.min.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/unified-bundle.min.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/vega.min.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/vega-lite.js"></script>
   <script type="text/javascript" src="./lib/stencila/katex/katex.min.js"></script>
+  <script type="text/javascript" src="./lib/stencila/lib/stencila-mini.js"></script>
   <script type="text/javascript" src="./lib/stencila/stencila.js"></script>
   <script type="text/javascript" src="./lib/stencila/guides.js"></script>
   <script>
diff --git a/src/document.html b/src/document.html
index ca2589b..da84f13 100644
--- a/src/document.html
+++ b/src/document.html
@@ -5,13 +5,13 @@
   <title>Stencila - Edit</title>
   <link href="./lib/stencila/stencila.css" rel="stylesheet" type="text/css">
   <script type="text/javascript" src="./lib/stencila/lib/substance.js"></script>
-  <script type="text/javascript" src="./lib/stencila/lib/substance-mini.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/brace.min.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/d3.min.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/unified-bundle.min.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/vega.min.js"></script>
   <script type="text/javascript" src="./lib/stencila/lib/vega-lite.js"></script>
   <script type="text/javascript" src="./lib/stencila/katex/katex.min.js"></script>
+  <script type="text/javascript" src="./lib/stencila/lib/stencila-mini.js"></script>
   <script type="text/javascript" src="./lib/stencila/stencila.js"></script>
   <script>
     window.brace = window.ace
diff --git a/src/document/DocumentMenuBuilder.js b/src/document/DocumentMenuBuilder.js
index c8698ac..4125527 100644
--- a/src/document/DocumentMenuBuilder.js
+++ b/src/document/DocumentMenuBuilder.js
@@ -3,8 +3,8 @@ const { Menu } = require('electron').remote
 const macOSAboutMenu = require('../menu/macOSAboutMenu')
 const fileMenu = require('../menu/fileMenu')
 const editMenu = require('../menu/editMenu')
-const annotateMenu = require('../menu/annotateMenu')
-const insertMenu = require('../menu/insertMenu')
+// const annotateMenu = require('../menu/annotateMenu')
+// const insertMenu = require('../menu/insertMenu')
 const viewMenu = require('../menu/viewMenu')
 const windowMenu = require('../menu/windowMenu')
 
@@ -19,8 +19,8 @@ class DocumentMenuBuilder {
     }
     documentMenu.push(fileMenu(appState))
     documentMenu.push(editMenu(appState))
-    documentMenu.push(annotateMenu(appState))
-    documentMenu.push(insertMenu(appState))
+    // documentMenu.push(annotateMenu(appState))
+    // documentMenu.push(insertMenu(appState))
     documentMenu.push(viewMenu(appState))
     documentMenu.push(windowMenu(appState))
     return Menu.buildFromTemplate(documentMenu)
diff --git a/src/document/documentWindow.js b/src/document/documentWindow.js
index eeafc72..4ea9315 100644
--- a/src/document/documentWindow.js
+++ b/src/document/documentWindow.js
@@ -84,10 +84,21 @@ _updateMenu(appState)
 
 window.addEventListener('load', () => {
   initBackend().then((backend) => {
-    let host = new Host()
+    // A new host in the browser window that will discover peers:
+    //  e.g. Stencila Node.js host started in `main.js`
+    //  e.g. Stencila R host started 'manually' locally
+    //  e.g. Stencila Python host started in a docker container
+    let host = new Host({
+      // Attempt to discover hosts every x seconds
+      discover: 30
+    })
+    window.host = host
+
     window.backend = backend
+
     let documentId = getQueryStringParam('documentId')
     window.documentId = documentId
+
     window.documentPage = DocumentPage.mount({
       host,
       backend,
diff --git a/src/main.js b/src/main.js
index ede0ab0..00f4e32 100644
--- a/src/main.js
+++ b/src/main.js
@@ -6,6 +6,10 @@ const url = require('url')
 
 const { app, ipcMain, Menu } = electron // eslint-disable-line no-unused-vars
 
+// Run a Stencila Node.js host to provide execution contexts etc
+const { host } = require('stencila-node')
+host.start()
+
 // Keep a global reference of the window object, if you don't, the window will
 // be closed automatically when the JavaScript object is garbage collected.
 let mainWindow
@@ -47,6 +51,8 @@ app.on('window-all-closed', function () {
   if (process.platform !== 'darwin') {
     app.quit()
   }
+  // Stop the Stencila Node.js host
+  host.stop()
 })
 
 app.on('activate', function () {
diff --git a/src/shared/initBackend.js b/src/shared/initBackend.js
index df772a4..4f8a792 100644
--- a/src/shared/initBackend.js
+++ b/src/shared/initBackend.js
@@ -1,12 +1,11 @@
 /* window process */
-const { FileSystemBackend } = require('stencila-node')
-const remote = require('electron').remote
 const path = require('path')
 const fs = require('fs')
-const { app } = remote
 
-const DOCUMENTS_DIR = app.getPath('documents')
-const STENCILA_LIBRARY_DIR = path.join(DOCUMENTS_DIR, 'Stencila-0.26.0')
+const { FileSystemBackend, host } = require('stencila-node')
+const { version } = require('../package.json')
+
+const STENCILA_LIBRARY_DIR = path.join(host.userDir(), `library-${version}`)
 const STENCILA_LIBRARY_FILE = path.join(STENCILA_LIBRARY_DIR, 'library.json')
 const fileSystemBackend = new FileSystemBackend(STENCILA_LIBRARY_DIR)