To restart the app, follow these steps.
1) When you slide up from the bottom of the screen, you can see the navigation bar, which contains back, home and overview buttons.
2) Press the Overview button(square button). It shows all the recently opened apps. You can see the Yuze app here.
3) You need to remove the Yuze app from the recent apps. Holding down the Yuze app, swipe up or use the clear all option to do this.
4) Now, open the Yuze app again from the apps. This will restart the app.