6.0.0 with exfat installed fine for me on ChoiNX 1.0.1 (though I was on 5.1.0 exfat).For people who are impatient about updating to 6.0 (NOT RECOMMENDED) do not install exFAT when using ChoiDujourNX, it will cause a semi-brick to your console since it doesn't know the new parameters for exFAT in 6.0
I dumped 6.0.0 myself from CDN though, so that might be why. Either way, the zip I used has md5 89e7dd0e986d3f09d5f508d30d39ccaa. That's tried and true, at least for me.