This application has been obsoleted by one or more applications that serve the same purpose, but are more stable or maintained.
This is a simple program for extracting/injecting SecureInfo_A (4.x only). It simplify the process without having to about cutting/XORing whole FAT16 partition every time (it only requires the untouched encrypted NAND.BIN along with corresponding nand.fat16.xorpad).
SecureInfo used for system region changing (JP/US/EU etc). Basically, you install few system CIA files for your target region (3DNUS/UpdateCDN), extract and inject new SecureInfo_A to emuNAND from target region donor, write emuNAND back and Format System Memory in System Settings.
User guide
First downgrade to 4.x FW and prepare 4.x emuNAND with DevMenu/BigBlueMenu.
Then download and install following system CIAs using 3DNUS for desired region.