Please be more accurate on what you did. Where did you click "install updates" and "install DLC"? Also if you have connected your EmuNAND to the internet you can get banned. If you connected once to the internet with CFW Nintendo could have flagged you and ban you later in a banwave. Just stop going online now won't save anything.
When installing an NSP with SX Installer you can bring up a list of additional options, “install latest update” and “install DLC” are there. I’ve tried it again and even though it says “downloading” with a bar filling up, I don’t think it really is downloading, I think it’s just installing the files from the SD card. I’ll see if my sysnand survives.