If the payment application is removed from the terminal home screen (e.g. by mistake), you can return it manually via the widget menu.
N5 Move/N5 Fix
To open the app menu, click the app menu icon.

Go to the Widgets tab.
Swipe from right to left to go to the next page.
Press and hold the Switchio Pay widget (or Switchio Store, depending on which widget is missing).
Drag the widget to the home screen.
N80 Move/CT20 Fix/N92 App
Press and hold an empty space on the terminal home screen.
In the menu that opens, select the Widgets tab.
In the Gallery window, scroll down until you find the Switchio Pay or Switchio Store widget (depending on which widget is missing).
Press and hold the selected widget and drag it to the home screen.