No, you didn't misunderstand it! The tool allows to access all PalmOS devices, also from other vendors,e.g. to upload/download databases and files. However, it requires Palm Desktop. Why? The USB libraries used by other software aren't documented, so the plugin doesn't know how to call them!Perhaps I am not understanding how this tool is supposed to work??
What's strange is that you don't get an error that the USB dll isn't found! So apparently you do have the usbport.dll on your system, but it doesn't work with the parameters passed to it from TC...