I downgraded my 3DSXL Mario and Luigi Dream Team edition to 4.2 and then restored the backup that I made, worked just fine. This is only a confirmation that it worked for me, in case anyone is afraid to do it. As always this stuff is at your own risk. Good luck and happy playing. EDIT: forgot to mention, this was done WITHOUT gateway. Another Edit: Just downgraded, tooled around with CFW, restored and still all good yay! Thanks gateway team for releasing this important 3DS tool.