Here's a working save for N3ds with 10.4. I just used powersaves to apply it to my game and confirm it works. Here are the instructions pulled form another post
Download
https://mega.nz/#!noMWXQTJ!brWoZ67mw71l109hOTniwVc27XabsxT-XOSPgh3kHrM and place it in Powersaves Local Save folder
C:\Users\NAMEHERE\Powersaves3DS
I made a quick backup of my LoZ OoT game and basically just renamed the Hax*Save file to the same as my backup aside from the (N3DS_x.xU_hax25) at the end (because that is the name of the backup that the powersave application reads) then proceeded to restore the hax backup to my Game Card and from there just ran the exploit like you would after installing it directly from the installer
-Open the Game
-Load the First Save file named Idleway(whatever the hell the rest of the name says)
-After the file loaded, Press A and let the exploit do its thing