Canon BJC-S820D User Manual page 70

Always start the same application.
When you select this option, the system always starts same application
regardless of the type of data stored on the memory card.
Note
To change the application to be started, click the Change the application
button in the Auto-Start Properties dialog box, and select the application to
be started.
Using the Memory Card Startup Utility (Windows)
Setting the Application to Be Started 70