Hi Santos,
Freescale provides example software for FRDM-KL46Z, which could be downloaded from here.
It includes CodeWarrior project, you can use those projects, after compile to program the FRDM-KL46Z board.
You can use default on board OpenSDA as debugger tool, if there with problem to program the Flash, you can visit below link and download the latest P&E OpenSDA firmware.
P&E Microcomputer Systems
You could select to use [DEBUG-APP_Pemicro_v108.SDA] or [MSD-DEBUG-FRDM-KL46Z48M_Pemicro_v114.SDA] firmware files to update the FRDM-KL46Z board.
Wish it helps.
Have a great day,
Ma Hui
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