Cannot flash binaries on USB-KW41Z

[Th3S4mur41]

Hi,

I need some support...
Following the setps in the readme, I've able to build the binaries, but I'm stuck on the flashing step

The link to the NXP Test Tool is broken but I managed to find a working one: https://www.nxp.com/webapp/sps/download/license.jsp?colCode=Test_Tool_12.9.2.2&appType=file1&DOWNLOAD_ID=null&

Problem is, while the device is recognized on my machine and shows up in various tools (ZGWUI, OTA Thread, ..), weirdly it does not show up the Firmware loader tool

Any idea how to fix it on suggestion for a different approach to flash the image onto the device?