diff --git a/app/lib/app.ts b/app/lib/app.ts
index 27061917..dea1f1a3 100644
--- a/app/lib/app.ts
+++ b/app/lib/app.ts
@@ -6,7 +6,7 @@ import * as path from 'path'
 import * as fs from 'fs'
 import { Subject, throttleTime } from 'rxjs'
 
-import { loadConfig } from './config'
+import { saveConfig } from './config'
 import { Window, WindowOptions } from './window'
 import { pluginManager } from './pluginManager'
 import { PTYManager } from './pty'
@@ -23,10 +23,10 @@ export class Application {
     private windows: Window[] = []
     private globalHotkey$ = new Subject<void>()
     private quitRequested = false
-    private configStore: any
     userPluginsPath: string
 
-    constructor () {
+    // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+    constructor (private configStore: any) {
         remote.initialize()
         this.useBuiltinGraphics()
         this.ptyManager.init(this)
@@ -36,6 +36,10 @@ export class Application {
             this.configStore = config
         })
 
+        ipcMain.on('app:save-config', (_event, data) => {
+            saveConfig(data)
+        })
+
         ipcMain.on('app:register-global-hotkey', (_event, specs) => {
             globalShortcut.unregisterAll()
             for (const spec of specs) {
@@ -63,7 +67,6 @@ export class Application {
             }
         })
 
-        this.configStore = loadConfig()
         if (process.platform === 'linux') {
             app.commandLine.appendSwitch('no-sandbox')
             if (((this.configStore.appearance || {}).opacity || 1) !== 1) {
@@ -111,7 +114,7 @@ export class Application {
     }
 
     async newWindow (options?: WindowOptions): Promise<Window> {
-        const window = new Window(this, options)
+        const window = new Window(this, this.configStore, options)
         this.windows.push(window)
         if (this.windows.length === 1){
             window.makeMain()
diff --git a/app/lib/config.ts b/app/lib/config.ts
index 3cf951ab..cd183986 100644
--- a/app/lib/config.ts
+++ b/app/lib/config.ts
@@ -1,26 +1,47 @@
-import * as fs from 'fs'
+import * as fs from 'mz/fs'
 import * as path from 'path'
 import * as yaml from 'js-yaml'
+import { v4 as uuidv4 } from 'uuid'
+import * as gracefulFS from 'graceful-fs'
 import { app } from 'electron'
+import { promisify } from 'util'
 
-export function migrateConfig (): void {
+export async function migrateConfig (): Promise<void> {
     const configPath = path.join(app.getPath('userData'), 'config.yaml')
     const legacyConfigPath = path.join(app.getPath('userData'), '../terminus', 'config.yaml')
-    if (fs.existsSync(legacyConfigPath) && (
-        !fs.existsSync(configPath) ||
-        fs.statSync(configPath).mtime < fs.statSync(legacyConfigPath).mtime
+    if (await fs.exists(legacyConfigPath) && (
+        !await fs.exists(configPath) ||
+        (await fs.stat(configPath)).mtime < (await fs.stat(legacyConfigPath)).mtime
     )) {
-        fs.writeFileSync(configPath, fs.readFileSync(legacyConfigPath))
+        await fs.writeFile(configPath, await fs.readFile(legacyConfigPath))
     }
 }
 
-export function loadConfig (): any {
-    migrateConfig()
+export async function loadConfig (): Promise<any> {
+    await migrateConfig()
 
     const configPath = path.join(app.getPath('userData'), 'config.yaml')
-    if (fs.existsSync(configPath)) {
-        return yaml.load(fs.readFileSync(configPath, 'utf8'))
+    if (await fs.exists(configPath)) {
+        return yaml.load(await fs.readFile(configPath, 'utf8'))
     } else {
         return {}
     }
 }
+
+const configPath = path.join(app.getPath('userData'), 'config.yaml')
+let _configSaveInProgress = Promise.resolve()
+
+async function _saveConfigInternal (content: string): Promise<void> {
+    const tempPath = configPath + '.new.' + uuidv4().toString()
+    await fs.writeFile(tempPath, content, 'utf8')
+    await fs.writeFile(configPath + '.backup', content, 'utf8')
+    await promisify(gracefulFS.rename)(tempPath, configPath)
+}
+
+export async function saveConfig (content: string): Promise<void> {
+    try {
+        await _configSaveInProgress
+    } catch { }
+    _configSaveInProgress = _saveConfigInternal(content)
+    await _configSaveInProgress
+}
diff --git a/app/lib/index.ts b/app/lib/index.ts
index 654e52ed..092f32a4 100644
--- a/app/lib/index.ts
+++ b/app/lib/index.ts
@@ -3,40 +3,63 @@ import './portable'
 import 'source-map-support/register'
 import './sentry'
 import './lru'
-import { app, ipcMain, Menu } from 'electron'
+import { app, ipcMain, Menu, dialog } from 'electron'
 import { parseArgs } from './cli'
 import { Application } from './app'
 import electronDebug = require('electron-debug')
+import { loadConfig } from './config'
 
 if (!process.env.TABBY_PLUGINS) {
     process.env.TABBY_PLUGINS = ''
 }
 
-const application = new Application()
-
-ipcMain.on('app:new-window', () => {
-    application.newWindow()
-})
-
-app.on('activate', () => {
-    if (!application.hasWindows()) {
-        application.newWindow()
-    } else {
-        application.focus()
-    }
-})
-
-process.on('uncaughtException' as any, err => {
-    console.log(err)
-    application.broadcast('uncaughtException', err)
-})
-
-app.on('second-instance', (_event, argv, cwd) => {
-    application.handleSecondInstance(argv, cwd)
-})
-
 const argv = parseArgs(process.argv, process.cwd())
 
+loadConfig().then(configStore => {
+    const application = new Application(configStore)
+
+    ipcMain.on('app:new-window', () => {
+        application.newWindow()
+    })
+
+    app.on('activate', () => {
+        if (!application.hasWindows()) {
+            application.newWindow()
+        } else {
+            application.focus()
+        }
+    })
+
+    process.on('uncaughtException' as any, err => {
+        console.log(err)
+        application.broadcast('uncaughtException', err)
+    })
+
+    app.on('second-instance', (_event, newArgv, cwd) => {
+        application.handleSecondInstance(newArgv, cwd)
+    })
+
+    app.on('ready', async () => {
+        if (process.platform === 'darwin') {
+            app.dock.setMenu(Menu.buildFromTemplate([
+                {
+                    label: 'New window',
+                    click () {
+                        this.app.newWindow()
+                    },
+                },
+            ]))
+        }
+        application.init()
+
+        const window = await application.newWindow({ hidden: argv.hidden })
+        await window.ready
+        window.passCliArguments(process.argv, process.cwd(), false)
+    })
+}).catch(err => {
+    dialog.showErrorBox('Could not read config', err.message)
+})
+
 if (!app.requestSingleInstanceLock()) {
     app.quit()
     app.exit(0)
@@ -49,21 +72,3 @@ if (argv.d) {
         devToolsMode: 'undocked',
     })
 }
-
-app.on('ready', async () => {
-    if (process.platform === 'darwin') {
-        app.dock.setMenu(Menu.buildFromTemplate([
-            {
-                label: 'New window',
-                click () {
-                    this.app.newWindow()
-                },
-            },
-        ]))
-    }
-    application.init()
-
-    const window = await application.newWindow({ hidden: argv.hidden })
-    await window.ready
-    window.passCliArguments(process.argv, process.cwd(), false)
-})
diff --git a/app/lib/window.ts b/app/lib/window.ts
index c49f1c5b..01843b88 100644
--- a/app/lib/window.ts
+++ b/app/lib/window.ts
@@ -11,7 +11,6 @@ import { compare as compareVersions } from 'compare-versions'
 
 import type { Application } from './app'
 import { parseArgs } from './cli'
-import { loadConfig } from './config'
 
 let DwmEnableBlurBehindWindow: any = null
 if (process.platform === 'win32') {
@@ -42,7 +41,6 @@ export class Window {
     private closing = false
     private lastVibrancy: { enabled: boolean, type?: string } | null = null
     private disableVibrancyWhileDragging = false
-    private configStore: any
     private touchBarControl: any
     private isFluentVibrancy = false
     private dockHidden = false
@@ -50,9 +48,8 @@ export class Window {
     get visible$ (): Observable<boolean> { return this.visible }
     get closed$ (): Observable<void> { return this.closed }
 
-    constructor (private application: Application, options?: WindowOptions) {
-        this.configStore = loadConfig()
-
+    // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+    constructor (private application: Application, private configStore: any, options?: WindowOptions) {
         options = options ?? {}
 
         this.windowConfig = new ElectronConfig({ name: 'window' })
diff --git a/tabby-electron/src/services/hostApp.service.ts b/tabby-electron/src/services/hostApp.service.ts
index 0f57fb74..15f30397 100644
--- a/tabby-electron/src/services/hostApp.service.ts
+++ b/tabby-electron/src/services/hostApp.service.ts
@@ -65,6 +65,10 @@ export class ElectronHostAppService extends HostAppService {
         this.electron.ipcRenderer.send('app:config-change', configStore)
     }
 
+    saveConfig (data: string): void {
+        this.electron.ipcRenderer.send('app:save-config', data)
+    }
+
     emitReady (): void {
         this.electron.ipcRenderer.send('app:ready')
     }
diff --git a/tabby-electron/src/services/platform.service.ts b/tabby-electron/src/services/platform.service.ts
index 694ff871..8a79a1ac 100644
--- a/tabby-electron/src/services/platform.service.ts
+++ b/tabby-electron/src/services/platform.service.ts
@@ -1,17 +1,15 @@
 import * as path from 'path'
 import * as fs from 'fs/promises'
-import * as gracefulFS from 'graceful-fs'
 import * as fsSync from 'fs'
 import * as os from 'os'
-import { v4 as uuidv4 } from 'uuid'
-import { promisify } from 'util'
 import promiseIpc, { RendererProcessType } from 'electron-promise-ipc'
 import { execFile } from 'mz/child_process'
 import { Injectable, NgZone } from '@angular/core'
-import { PlatformService, ClipboardContent, HostAppService, Platform, MenuItemOptions, MessageBoxOptions, MessageBoxResult, FileUpload, FileDownload, FileUploadOptions, wrapPromise, TranslateService } from 'tabby-core'
+import { PlatformService, ClipboardContent, Platform, MenuItemOptions, MessageBoxOptions, MessageBoxResult, FileUpload, FileDownload, FileUploadOptions, wrapPromise, TranslateService } from 'tabby-core'
 import { ElectronService } from '../services/electron.service'
 import { ElectronHostWindow } from './hostWindow.service'
 import { ShellIntegrationService } from './shellIntegration.service'
+import { ElectronHostAppService } from './hostApp.service'
 const fontManager = require('fontmanager-redux') // eslint-disable-line
 
 /* eslint-disable block-scoped-var */
@@ -27,10 +25,9 @@ try {
 export class ElectronPlatformService extends PlatformService {
     supportsWindowControls = true
     private configPath: string
-    private _configSaveInProgress = Promise.resolve()
 
     constructor (
-        private hostApp: HostAppService,
+        private hostApp: ElectronHostAppService,
         private hostWindow: ElectronHostWindow,
         private electron: ElectronService,
         private zone: NgZone,
@@ -112,18 +109,7 @@ export class ElectronPlatformService extends PlatformService {
     }
 
     async saveConfig (content: string): Promise<void> {
-        try {
-            await this._configSaveInProgress
-        } catch { }
-        this._configSaveInProgress = this._saveConfigInternal(content)
-        await this._configSaveInProgress
-    }
-
-    async _saveConfigInternal (content: string): Promise<void> {
-        const tempPath = this.configPath + '.new.' + uuidv4().toString()
-        await fs.writeFile(tempPath, content, 'utf8')
-        await fs.writeFile(this.configPath + '.backup', content, 'utf8')
-        await promisify(gracefulFS.rename)(tempPath, this.configPath)
+        this.hostApp.saveConfig(content)
     }
 
     getConfigPath (): string|null {