The FRDM-KW36 comes with the OpenSDA circuit which allows users to program and debug the evaluation board. There are different solutions to support such OpenSDA circuits:
1. The J-Link (SEGGER) firmware.
2. The CMSIS-DAP (mbed) firmware.
The FRDM-KW36 comes pre-programmed with the CMSIS-DAP firmware. However, if you want to update the firmware version, you need to perform the next steps.
The binary for the J-link version can be downloaded from the next link:
SEGGER - The Embedded Experts - Downloads - J-Link / J-Trace
The binary for the CMSIS-DAP version can be found in the next link:
OpenSDA Serial and Debug Adapter|NXP
Hope this helps...
Many of the NXP OpenSDA boot loaders are vulnerable to Windows 8.x or Windows 10: write accesses of Windows can confuse the factory bootloader and make the debug firmware and bootloader useless Viva Video.