Hi,
Hope you are doing well. The objective of the example is not only to use the function BleApp_Start();. You can see in the function BleApp_HandleKeys() that we have four functionalities with the buttons.

But if you don't want to use the buttons, and the other functionalities of the example, what you can do is call the BleApp_Start() function inside the main_task() function, on the line before App_Thread (param);
Hope this helps.
Regards,
Ricardo