Unable to start nRF connect(BLE)

[xvhongpeng]

Dear friends, according to "nRFConnect_BLE_User_Guide_v2.0", to set up a local device,i should complete the following steps:

1. Connect a development kit or dongle to the computer with USB.
2. In the navigation bar, click on the Select serial port menu.
3. Select a serial port for the device. I have connect a nRF52832 DK(PCA10036) to the computer with USB. However, i cannot continue step 2, because no serial port i can select. For what? regards.