Guys. To compile, download the latest version of ctrulib from here, and compile it. There will be a folder called "lib", and a file called libctru.a. Go to your devkitpro folder, then libctru, then lib, and put the new libctru.a there. After that, you will be able to compile memchunkhax2.
Also, do I just close the app by using Down + L + R + B?
I'm sure someone will upload it anyway.
