Hello Bijesh C,
Yes, you can use the USB-KW41Z to run the Bluetooth demo applications.
I believe you are using the Kinetis KW41Z Connectivity Software (REV 1.0.2). This version of the software supports KDS and IAR IDEs. You can refer to the "<ConnSw>\docs\wireless\Bluetooth\BLE Quick Start Guide.pdf" document for instructions on how to run the demos.
Please note that there is a newer version of the wireless stacks available from the MCUXpresso SDK Builder. This newer SDK is supported in MCUXpresso v10.0.2 and IAR IDEs.
Best regards,
Gerardo