In order to uninstall the ETS Inside server from the installed computer, please follow the procedure that is described here:
Open the 'Program and Features' from the Windows 10 (1)
Click the 'ETS Inside' entry (2) and then click 'Uninstall' (3).
You will see the ETS Inside change window. Press the 'Uninstall' button (4). This will trigger the mechanism to uninstall the ETS Inside from your computer.
Please note, that the IIS (Internet Information Services) is not uninstalled intentionally, since it may be used by another application that is installed on the same computer.