Hi @rvigneault ,
Thank you for your interest in the NXP MIMXRT product, I would like to provide service for you.
To the RT1024 default flashdriver, even you don't set it, it should also the MIMXRT1024.cfx.
Do you try the SDK demo directly?
Whether that works or not?
I mean, this one:

If this works, then even you don't set the GUI flashdriver, it should also works.
Please try it.
If you still have questions about it, please kindly let me know.
Best Regards,
kerry