On older systems the default GPU selection is done through the driver interface. We can start by right-clicking on the arivis Pro app icon and then select Run with graphics processor> Change default graphics processor...

On newer systems we need to do this through the graphics control panel. Depending on your installation it can be opened in a variety of ways (e.g. through the Start menu, Taskbar shortcuts, or right-clicking on the desktop). This will open the driver window for the GPU you are using. In this example we are using a NVIDIA GPU and so this opens the NVIDIA Control Panel:

We can then click the Add button to select the path for the arivisPro.exe application and then select which GPU to use by default below.

From then on, the system will default to that GPU when launching the application.