Hei there! I see most of you guys are having problems corrupting the ds mode with the ROPLoader, wich is the actually public installer for the 3ds exploit. Well a solution to this is to edt the real Gateway installer to read decrypted data, but sharing it would be illegal, i think. So i created this little tool as solution, wich encrypts/decrypts the Launcher.dat (or any other...) with the Gateway keys so you can use the original installer and encrypt all the homebrews. Download here! Usage : Just drag and drop the file you want on the tool, it will detetch if it's encrypted or decrypted, and will decrypt or encrypt it on his own. For those who are developing with the current little public c/c++ libraries, just copy the tool in your developing directory and add this line at the end of build.py file: Code: os.system("3ds_mset_sign.exe Launcher.dat"); Then it will automatically encrypt the Launcher.dat for you every time you compile your code.