What you are experiencing is the NORMAL behavior with explorer.exe.
Running Explorer.exe launches the Windows Taskbar, by default. It is a standard Windows behavior.
You have two solutions to prevent the launch of the Taskbar:
- publish explorer.exe and add in the 'parameter' field a path.
It will open explorer with a parameter and it won't launch the Taskbar.
- publish folder.exe (tsplus/userdesktop/files/) with our without a path in the parameters.
By default folder.exe will display the content of the Dektop.
This screenshot shows how you can set a path, for a better understanding:
