Resolving Pairing Issue DPA

I found a way to solve the problem that the digital paper app is not able to find dpt when pairing.

1. Open device manager and check if there's any conflict ports in ports(COM&LPT) section. (For example, maybe there're two devices that were assigned COM3)
2. And, if there's conflict, try to figure out which one is dpt. (You can find when the device was plugged in from properties--> events)
3. Then you should change its port number(in properties -> port settings -> advanced) to any port that is not in use.
4. Save, and unplug the device.
5. Open digital paper app and try to pair again.

Some background knowledge: https://github.com/janten/dpt-rp1-py/blob/master/docs/linux-ethernet-over-usb.md