For this problem, you cannot open the virtual serial screen, follow the instructions.TXT file to do the registration steps.I have attached TXT file, which can be downloaded directly and used.
Instructions for use:
If the preview function and serial debugging assistant in VGUS4.3 development tools are not available,
Run the registry.bat
The program will automatically copy MSCOMM32.Ocx control to c:\ Windows \ System32 folder,
And call the Regsvr32 command register,
If the registration is successful, it indicates that you will be registered, and you can use the serial Debugging Assistant preview function.