I have V1 on my MicroSD card and i'm using Cakes FW (did it back when A9LH was used) and I tried to follow the Plailect's guide to update to V2. Turns out just downloading the files didn't cut it b/c my 3DS wouldn't boot anymore b/c it was missing the Cakes.dat file...thankfully, I have a backup.....restoring that now....