I recently purchased a 6.2.0-0U 3ds which has never been online since the browser demands to be updated before I could use it (and I know I shouldn't update any higher). I want to know how to get rxtools on it. I have a Sky3ds blue button with Cubic Ninja and a ds flashcart that works on the 3ds. I have tried the ninjhax exploit but they don't have a QR code for the -0U firmware. It starts at -7U which I'm not quite sure how to get to... I have tried the rxinstaller.nds MSET exploit for the DS flashcart but no luck either. I have the following files on the root of the sd card : rxtools.dat, the rxtools 2.6 folder (dumped the contents to the root of the card also just to be sure), firmware, and slot0x25KeyX (obtained from the #UnlockEverything zip file). The rxinstaller keeps saying installed and the problem comes up when I hit DS Profile. It just keeps crashing and restarting back to the menu (An error has occurred,forcing the software to close. The system will now restart). I'm not sure where I went wrong. Holding L or R while booting the DS Profile doesn't help. How do I install rxtools now?