POP-BOT XT : The Arduino Compatible Mobile Robot kit ď Źď€ 45
3.2.3 USB driver installation for changing the USB port After installing the USB drivers completed; user should continue to use the same USB port. In case of any change to the USB port; there maybe a need to re-install new drivers which may be different from the above explained normal steps. The driver installation starts with USB composite device driver installation. After that, install the POP-XT controller board driver. It is called Caterina in boot mode. This step requires the OK switch pressing on the POP-XT controller board. (3.2.3.1) After connect the POP-XT controller board to new USB port, the computer detects new hardware and ask for the location of the driver file to install again. It is second round of USB driver installation. Click on the Install from a list or specific location (Advanced) and click on the Next button to next step.
(3.2.3.2) Also choose the location as C:\Arduino\Drivers . Click on the Next button.