Hi Tim:
I would suggest you delete the existing launch configuration , then a debug probe discovery operation will be automatically performed to display the available debug connections.
Please refer to below link for more details.
https://community.nxp.com/docs/DOC-335463
Regards
Daniel
When powered with the USB in the debug port the yellow LED flashes quickly.
Also, tried using J-Link to connect got
SEGGER J-Link Commander V6.40 (Compiled Oct 26 2018 15:07:23)
DLL version V6.40, compiled Oct 26 2018 15:07:12
Connecting to J-Link via USB...FAILED: Cannot connect to J-Link via USB.