*sigh, you will have to access the sd card on an external device like a pc, tablet, or phone. it will not just be called homemenu extra data, hereBut I don't have nothing named home menu in Extra Data good friend.
Clear Home Menu’s extdata by navigating to the following folder on your SD card: /Nintendo 3DS/(32 Character ID)/(32 Character ID)/extdata/00000000/
EUR Region: Delete 00000098
JPN Region: Delete 00000082
USA Region: Delete 0000008f
KOR Region: Delete 000000A9
TWN Region: Delete 000000B1