Method 1: Use uninstall software. You can install an uninstall software on the car, such as beetle ADB assistant, and then run the software to find the application package name of Difen Desktop (generally com.miktone.difenzhuomian) and choose to uninstall.
Method 2: Use the file manager. You can install a file manager in the car, such as ES file browser, then open the software, find the installation directory of Diffen desktop (generally/storage/emulated/0/Android/data/com.miktone.difenzhuomian), and delete all files and folders in this directory.
Method 3: Used to restore factory settings. You can enter the settings menu of the car and choose to restore the factory settings, which will erase all the data and applications on the car, including the desktop of Diffen. Note that this method will cause your personal data and other applications to be deleted. Please be careful and back up important data in advance.