Go into the deskcnc folder and find either the file default ini or if you saved your setting under a different name such as router, you can copy it to the same folder on the new machine. You can open the file with notepad to make sure it is the file that has all the settings that you are looking for.
If the file is in fact called default, you will have to overwrite the old file on th enew machine when copying it.
If the blue light flashes, you might be getting a voltage sag or something or possibly the estop button is being pressed.
Are you using the serial port on both computers or are you using a usb to serial converter on either machine?