STICKERHAX CONFIRMED WORKING! On New3DS 11.7.0.40 U, at least.
Here's the thing: sploit-installer-stickerhax isn't downloading the right payload - at least, not yet. It's kind of obvious, really; if you look at the top of the "home menu ropbin is ready" screen (before it crashes back to the Home menu), you'll see a 2017 date.
Here's what you do:
-If you haven't already, run sploit-installer-stickerhax (included with the Homebrew starter kit).
-Run JKSM. (I use the version from
the GBAtemp thread.) Export the save data from your sploited Paper Mario: Sticker Star cart.
-This should get you four files: payload.bin, pm4_0.bin, pm4_1.bin, and pm4_2.bin.
-Go to
https://smealum.github.io/3ds/ and scroll down to "Otherapp/ropbin payloads". Specify "New 11.7.0-40 U" and click "Download otherapp".
-You'll be prompted to download N3DS_U_29697_usa_9221.bin. Download this file and rename this file to payload.bin.
-Overwrite the payload.bin that JKSM produced earlier with your new payload.bin.
-Run JKSM and import the save data again.
That's it! God is in his Decalburg, all's right with the world.