For some application it may be useful to start the PC software in serial mode - altough this connection type isn't safe. Here a description how to do this:
First, duplicate the desktop link by right click on the icon, copy, right click on the desktop, paste.
Next right click on the new ico, rename, name it new (e.g. VBar COM).
Right click again, properties. At the end of the target string remove all -s or -u or -b options. Just leave -n only.
Starting the pcs oft now, click on the blue connection icon and a dialog box comes up. Select the port assigned to your com device (see control panel). If it isn't there, add manually with "Hinzufügen".