Alternatively you could probably restore nand backup that you obviously () made when first setting up CFW using GW Launcher, if GW's nand restore feature supports N3DS. Decrypt9 should be able to restore nand backup too.
Actually DevMenu might be able to do it too, hadn't thought of that.
Since you are replacing an older version with a newer one it might not complain too much that a higher version already exists.
IIRC though DevMenu doesn't really deal with system titles, can't be used to remove system titles, so that's why people use FBI if they need to replace a system title. Usually with an older version though, maybe replacing an older version with a newer one won't throw any errors.
Also you are using an european console? You'd need 0004001000022000.cia in the 9.0.0-20E update pack then (9.1.0-20E and 9.2.0-20E would work too as they all have the same system settings app.)
I assumed you were using a north american one since your flag said USA, I guess maybe you could also just have left it as default location since it defaults to USA. Either way.
I believe to restore nand backup with GW Launcher you would have to hold Up on the Downgrade option or something. I'd just recommend using Decrypt9 though because it directly has an option to restore nand backup to sysnand.
wait, so it's just the calibration that's gone? the features still work right? also what happens if i create an emunand after installing MSET to sysnand? i made my emunand before i installed mset, now i'm worried if my emunand goes bonkers, i'll be screwed.
If you created emunand after downgrading system settings on sysnand, then your emunand has the downgraded system settings app.
You can change it back to 9.0 system settings by the esame method, downloading the .cia for system settings 9.0 (you'll probably have to download the full update pack and pick out the specific .cia) and install it to emunand over the old system settings.
I don't think you'd really be screwed if your emunand went bonkers though. How would you be screwed? You could just create a new emunand or restore a backup
You're saying you updated emunand to 9.5 using the full 9.5 update pack and it kept the 4.x system settings anyway?
And when you installed 9.x system settings in emunand it actually bricked it?
Forget everything I've said, then.
Well if you installed mset v9220 on your 9.5 emunand, that's the system settings app from 9.6 and onwards so it's possible it may cause issues, yes.
For 9.0-9.5 you have to use 0004001000022000 v8202, which is not on 3DNUS anymore. You have to pull it from the 9.0/9.1/9.2 .cia update pack.