You need hardmod to downgrade. I'm having the same issue with my 11.0 jpn xl console I will do the hard mod. If you have another 3ds with the same region you can use dsiware downgrade.
[QUOTE="akramff, post: 6662223, memberSiWare-Downgrade
ds is on ofw 11.0.0.33 i can ran homebrew and i have my nand copy and i want to downgrade to 9.2.0
sysupdater is running so can i use it ??
A quick forum search would have revealed questions like this have already been answered.
A short summary of 11.0
Can software downgrade: NO, even with ARM11 kernel (which doesn't yet exist)
Can downgrade at all: YES, but not without hardmod/another hacked 3ds
Can run CFW: NO, any firmware above 9.2 can't (excluding A9LH system)
Can install legit CIA: NO, ARM11 kernel exploit needed
Can run HBL: YES
Can run Decrypt9/sysUpdater/insert-other-brahma-software: NO
Basically for now it can only run non-kernel HBL apps.
humour is subjective.. if you dont see the humour, we have to at least recognise the attempted pretext of it within the social commentary its giving...