TWL mode functionality issues

To fix any TWL mode issues, we can delete our TWL titles and then re-download them from Nintendo's system update server.

Download the latest release of TWLFix-CFW (the .3dsx file)
Power off your device
Create a folder named 3ds on the root of your SD card if it does not already exist
Copy TWLFix-CFW.3dsx to the /3ds/ folder on your SD card
Reinsert your SD card into your device
Open the Homebrew Launcher
Launch TWLFix-CFW from the list of homebrew
Press (A) to uninstall the broken TWL titles
Press (Start) to reboot the device
Perform a System Update by going to System Settings, then "Other Settings", then going all the way to the right and using "System Update"
The update will see that the essential TWL titles have been uninstalled, and will redownload and reinstall them
Once the update is complete, tap "OK" to reboot the device