AppData.txt is missing

[RosalinaFan573]

Title speaks for itself.

[profi200]

I would recommend not using this anymore. It was badly hacked together. Instead try this until devkitARM has official CXI and CIA building tools:

https://github.com/profi200/sysUpdater/blob/master/Makefile

[RosalinaFan573]

I'm trying to use a custom sound and it gets replaced with 10 beeps. Now what?

[profi200]

bannertool which is used by the makefile above only accepts .bcwav files. Make sure your .wav has the correct sample rate and has been converted correctly.