diff --git a/app/actions/__tests__/invoices.spec.js b/app/actions/__tests__/invoices.spec.js
index 8e59411e..ed361531 100644
--- a/app/actions/__tests__/invoices.spec.js
+++ b/app/actions/__tests__/invoices.spec.js
@@ -1,7 +1,7 @@
 import * as ACTION_TYPES from '../../constants/actions.jsx';
 import * as actions from '../invoices';
 
-it('getInvoices should create GET_INVOICES action', () => {
+it('getInvoices should create INVOICE_GET_ALL action', () => {
   expect(actions.getInvoices()).toEqual({
     type: ACTION_TYPES.INVOICE_GET_ALL,
   });
diff --git a/app/middlewares/SettingsMW.jsx b/app/middlewares/SettingsMW.jsx
index caa9f427..041bb50f 100644
--- a/app/middlewares/SettingsMW.jsx
+++ b/app/middlewares/SettingsMW.jsx
@@ -32,10 +32,16 @@ const SettingsMW = ({ dispatch }) => next => action => {
       // Validation
       if (!validateTax(true, action.payload.invoice.tax)) break;
       if (!validateCurrency(true, action.payload.invoice.currency)) break;
+      // Change Preview Profile
+      const profile = appConfig.get('profile');
+      const newProfile = action.payload.profile;
+      if (profile !== newProfile) {
+        ipc.send('change-preview-window-profile', newProfile);
+      }
       // Change UI language
-      const currentLang = appConfig.get('general.language');
+      const { language } = appConfig.get('general');
       const newLang = action.payload.general.language;
-      if (currentLang !== newLang) {
+      if (language !== newLang) {
         // Change the language
         i18n.changeLanguage(newLang);
         // Notify previewWindow to update
diff --git a/app/middlewares/__tests__/SettingsMW.spec.js b/app/middlewares/__tests__/SettingsMW.spec.js
index c27e7a0c..cd418e1c 100644
--- a/app/middlewares/__tests__/SettingsMW.spec.js
+++ b/app/middlewares/__tests__/SettingsMW.spec.js
@@ -1,7 +1,14 @@
+// Libs
 import * as Actions from '../../actions/settings';
-import SettingsMW from '../SettingsMW';
 import * as ACTION_TYPES from '../../constants/actions.jsx';
+import SettingsMW from '../SettingsMW';
+import i18n from '../../../i18n/i18n';
+const sounds = require('../../../libs/sounds');
+const ipc = require('electron').ipcRenderer;
+const openDialog = require('../../renderers/dialog');
+import { validateCurrency, validateTax } from '../../helpers/form.js';
 
+// Mocking
 jest.mock('../../../libs/sounds');
 jest.mock('../../helpers/form');
 
@@ -33,33 +40,76 @@ describe('Settings Middleware', () => {
     );
   });
 
-  it('should handle SETTINGS_SAVE action', () => {
-    // TODO
-    // Validate data
-    const action = Actions.saveSettings({
-      profile: 'someSettings',
-      invoice: {
-        currency: {
-          code: 'USD',
-          fraction: 2,
-          separator: 'commaDot',
-          placement: 'before'
+  describe('should handle SETTINGS_SAVE action', () => {
+    let action;
+    beforeEach(() => {
+      action = Actions.saveSettings({
+        profile: 'New Profile',
+        general: {
+          language: 'fr',
         },
-        tax: {
-          tin: '123-456-789',
-          amount: 10,
-          method: 'default'
-        }
-      },
-      general: 'someSettings',
+        invoice: {
+          currency: {
+            code: 'USD',
+            fraction: 2,
+            separator: 'commaDot',
+            placement: 'before',
+          },
+          tax: {
+            tin: '123-456-789',
+            amount: 10,
+            method: 'default',
+          },
+        },
+      });
     });
-    middleware(action);
-    // Send Notification
-    expect(dispatch.mock.calls.length).toBe(1);
-    expect(next.mock.calls.length).toBe(1);
-    expect(next).toHaveBeenCalledWith(action);
+
+    it('should validate currency and tax data', () => {
+      middleware(action);
+      expect(validateCurrency).toHaveBeenCalled();
+      expect(validateCurrency).toHaveBeenCalledWith(true, action.payload.invoice.currency);
+      expect(validateTax).toHaveBeenCalled();
+      expect(validateTax).toHaveBeenCalledWith(true, action.payload.invoice.tax);
+    });
+
     // TODO
-    // check if a sound is played
+    it('should save data', () => {});
+
+    it('should reload sounds cache', () => {
+      middleware(action);
+      expect(sounds.preload).toHaveBeenCalled();
+    });
+
+    it('should notify previewWindow of language & profile change', () => {
+      // Clear calls count
+      ipc.send.mockClear();
+      middleware(action);
+      expect(ipc.send).toHaveBeenCalled();
+      expect(ipc.send.mock.calls.length).toEqual(2);
+      // Notify about profile change
+      expect(ipc.send.mock.calls[0][0]).toBe('change-preview-window-profile');
+      expect(ipc.send.mock.calls[0][1]).toBe('New Profile');
+      // Notify about UI Lang change
+      expect(ipc.send.mock.calls[1][0]).toBe('change-preview-window-language');
+      expect(ipc.send.mock.calls[1][1]).toBe('fr');
+    });
+
+    it('should call next and dispatch notification', () => {
+      middleware(action);
+      // Call Next
+      expect(next.mock.calls.length).toBe(1);
+      expect(next).toHaveBeenCalledWith(action);
+      // Send Notification
+      expect(dispatch.mock.calls.length).toBe(1);
+      expect(dispatch).toHaveBeenCalledWith({
+        type: ACTION_TYPES.UI_NOTIFICATION_NEW,
+        payload: {
+          type: 'success',
+          message: i18n.t('messages:settings:saved'),
+        },
+      });
+    });
+
   });
 
   it('let other actions pass through', () => {
diff --git a/main/preview-window.js b/main/preview-window.js
index 4a09a8ac..47aedf11 100644
--- a/main/preview-window.js
+++ b/main/preview-window.js
@@ -24,6 +24,11 @@ ipcMain.on('change-preview-window-language', (event, newLang) => {
   previewWindow.webContents.send('change-preview-window-language', newLang);
 });
 
+// Change invoice profile
+ipcMain.on('change-preview-window-profile', (event, newProfile) => {
+  previewWindow.webContents.send('change-preview-window-profile', newProfile);
+});
+
 // Save configs to invoice
 ipcMain.on('save-configs-to-invoice', (event, invoiceID, configs) => {
   mainWindow.webContents.send('save-configs-to-invoice', invoiceID, configs);
diff --git a/preview/Viewer.jsx b/preview/Viewer.jsx
index ab3e1233..bbe89236 100644
--- a/preview/Viewer.jsx
+++ b/preview/Viewer.jsx
@@ -39,6 +39,10 @@ class Viewer extends Component {
     ipc.on('change-preview-window-language', (event, newLang) => {
       dispatch(ActionsCreator.changeUILanguage(newLang));
     });
+    ipc.on('change-preview-window-profile', (event, newProfile) => {
+      dispatch(ActionsCreator.updateProfile(newProfile));
+    });
+
     ipc.on('pfd-exported', (event, options) => {
       const noti = Notify(options);
       // Handle click on notification
diff --git a/preview/actions/__test__/index.spec.js b/preview/actions/__test__/index.spec.js
new file mode 100644
index 00000000..7e190795
--- /dev/null
+++ b/preview/actions/__test__/index.spec.js
@@ -0,0 +1,42 @@
+import * as ACTION_TYPES from '../../constants/actions.jsx';
+import * as actions from '../index.jsx';
+
+it('updateInvoice should create INVOICE_UPDATE action', () => {
+  const invoiceData = { test: 'test'}
+  expect(actions.updateInvoice(invoiceData)).toEqual({
+    type: ACTION_TYPES.INVOICE_UPDATE,
+    payload: invoiceData,
+  });
+});
+
+it('updateConfigs should create SETTINGS_UPDATE_CONFIGS action', () => {
+  const configs = { test: 'test'}
+  expect(actions.updateConfigs(configs)).toEqual({
+    type: ACTION_TYPES.SETTINGS_UPDATE_CONFIGS,
+    payload: configs,
+  });
+});
+
+it('updateProfile should create SETTINGS_UPDATE_PROFILE action', () => {
+  const profile = { test: 'test'}
+  expect(actions.updateProfile(profile)).toEqual({
+    type: ACTION_TYPES.SETTINGS_UPDATE_PROFILE,
+    payload: profile,
+  });
+});
+
+it('changeUILanguage should create UI_CHANGE_LANGUAGE action', () => {
+  const language = 'fr';
+  expect(actions.changeUILanguage(language)).toEqual({
+    type: ACTION_TYPES.UI_CHANGE_LANGUAGE,
+    payload: language,
+  });
+});
+
+it('reloadConfigs should create SETTINGS_RELOAD_CONFIGS action', () => {
+  const newConfigs = { test: 'test'}
+  expect(actions.reloadConfigs(newConfigs)).toEqual({
+    type: ACTION_TYPES.SETTINGS_RELOAD_CONFIGS,
+    payload: newConfigs,
+  });
+});
diff --git a/preview/actions/index.jsx b/preview/actions/index.jsx
index dad10065..6c6cd95d 100644
--- a/preview/actions/index.jsx
+++ b/preview/actions/index.jsx
@@ -11,6 +11,11 @@ export const updateConfigs = createAction(
   configs => configs
 );
 
+export const updateProfile = createAction(
+  ACTION_TYPES.SETTINGS_UPDATE_PROFILE,
+  profile => profile
+);
+
 export const changeUILanguage = createAction(
   ACTION_TYPES.UI_CHANGE_LANGUAGE,
   language => language
diff --git a/preview/constants/actions.jsx b/preview/constants/actions.jsx
index d33fe6f6..eb7a18f9 100644
--- a/preview/constants/actions.jsx
+++ b/preview/constants/actions.jsx
@@ -7,3 +7,7 @@ export const UI_CHANGE_LANGUAGE = 'UI_CHANGE_LANGUAGE';
 // Settings
 export const SETTINGS_RELOAD_CONFIGS  = 'SETTINGS_RELOAD_CONFIGS';
 export const SETTINGS_UPDATE_CONFIGS = 'SETTINGS_UPDATE_CONFIGS';
+
+// Profile
+export const SETTINGS_UPDATE_PROFILE = 'SETTINGS_UPDATE_PROFILE';
+
diff --git a/preview/reducers/__test__/index.spec.js b/preview/reducers/__test__/index.spec.js
new file mode 100644
index 00000000..7f00d0b5
--- /dev/null
+++ b/preview/reducers/__test__/index.spec.js
@@ -0,0 +1,120 @@
+import * as ACTION_TYPES from '../../constants/actions.jsx';
+import faker from 'faker';
+import uuidv4 from 'uuid/v4';
+import RootReducer, {
+  getConfigs,
+  getInvoice,
+  getProfile,
+  getUILang,
+  getInvoiceLang,
+} from '../index.jsx';
+
+describe('RootReducer should', () => {
+  it('handle INVOICE_UPDATE action', () => {
+    const currentState = {
+      invoice: {},
+      configs: {},
+    };
+    const newState = RootReducer(currentState, {
+      type: ACTION_TYPES.INVOICE_UPDATE,
+      payload: {
+        invoice: 'invoice',
+        configs: 'configs',
+      }
+    })
+    expect(newState.invoice).toEqual({
+      invoice: 'invoice',
+      configs: 'configs',
+    });
+    expect(newState.configs).toEqual('configs');
+  });
+
+  it('handle UI_CHANGE_LANGUAGE action', () => {
+    const currentState = {
+      ui: { language: 'en' }
+    };
+    const newState = RootReducer(currentState, {
+      type: ACTION_TYPES.UI_CHANGE_LANGUAGE,
+      payload: 'fr'
+    })
+    expect(newState.ui.language).toEqual('fr');
+  });
+
+  it('handle SETTINGS_UPDATE_PROFILE action', () => {
+    const currentState = {
+      profile: 'Profile'
+    };
+    const newState = RootReducer(currentState, {
+      type: ACTION_TYPES.SETTINGS_UPDATE_PROFILE,
+      payload: 'New Profile'
+    })
+    expect(newState.profile).toEqual('New Profile');
+  });
+
+  it('handle SETTINGS_UPDATE_CONFIGS action', () => {
+    const currentState = {
+      configs: { template: 'minimal' }
+    };
+    const newState = RootReducer(currentState, {
+      type: ACTION_TYPES.SETTINGS_UPDATE_CONFIGS,
+      payload: {
+        name: 'template',
+        value: 'business',
+      }
+    })
+    expect(newState.configs.template).toEqual('business');
+  });
+
+  it('handle SETTINGS_RELOAD_CONFIGS action', () => {
+    const currentState = {
+      profile: 'Profile',
+      configs: {
+        language: 'fr',
+        template: 'minimal',
+        dateFormat: 'DDMMYY',
+      }
+    };
+    const newState = RootReducer(currentState, {
+      type: ACTION_TYPES.SETTINGS_RELOAD_CONFIGS,
+      payload: {
+        profile: 'New Profile',
+        general: { language: 'en' },
+        invoice: {
+          dateFormat: 'MMMM/DDDD/YYYY',
+          template: 'business',
+        }
+      }
+    })
+    expect(newState.profile).toEqual('New Profile');
+    expect(newState.configs.language).toEqual('en');
+    expect(newState.configs.template).toEqual('business');
+    expect(newState.configs.dateFormat).toEqual('MMMM/DDDD/YYYY');
+  });
+});
+
+describe('Selectors should', () => {
+  let state;
+  beforeEach(() => {
+    state = {
+      ui: { language: 'en' },
+      configs: { template: 'Business' },
+      invoice: { language: 'fr' },
+      profile: 'Profile',
+    }
+  });
+  it('getConfigs should return invoice current configs', () => {
+    expect(getConfigs(state)).toEqual(state.configs);
+  });
+  it('getInvoice should return invoice data', () => {
+    expect(getInvoice(state)).toEqual(state.invoice);
+  });
+  it('getProfile should return profile data', () => {
+    expect(getProfile(state)).toEqual('Profile');
+  });
+  it('getUILang should return profile data', () => {
+    expect(getUILang(state)).toEqual('en');
+  });
+  it('getInvoiceLang should return language of the invoice', () => {
+    expect(getInvoiceLang(state)).toEqual('fr');
+  });
+});
diff --git a/preview/reducers/index.jsx b/preview/reducers/index.jsx
index a571b1c9..36fbbd6f 100644
--- a/preview/reducers/index.jsx
+++ b/preview/reducers/index.jsx
@@ -42,6 +42,10 @@ const RootReducer = handleActions(
           language: action.payload
         })
       }),
+    [ACTION_TYPES.SETTINGS_UPDATE_PROFILE]: (state, action) =>
+      Object.assign({}, state, {
+        profile: action.payload
+      }),
     [ACTION_TYPES.SETTINGS_UPDATE_CONFIGS]: (state, action) =>
       Object.assign({}, state, {
         configs: Object.assign({}, state.configs, {