How to Ret ROM
Step 1.
Please select the correct Port which you can find in the device manager ( It Called USB-SERIAL CH340 )
!!Warning!! Don't click Refresh button)
Step 2.
Click Setting---Rst ROM
Step3.
When you see "Flash ROM Done" , means Rst ROM successful
Step4.
Now you can click Refresh button to connect the machine , you will see "Find Serial Ports Successful COMx"