I got distracted and this happened to me too. What you can do is reboot your console and hold X on boot for Cakes or hold L+R on boot for ARN. This boots into Decrypt9, so you can restore a copy of your sysNAND_original.bin.
Then you can load again arm9loaderhax.3dsx in HBL to use the proper...
It's not the movies or games downloads that I would worry about, like breaking into networks, downloading encrypted things, spying on network traffic. I have seen so many "Top Secret" seals on files when I was a kid
I was obsessed with finding UFOs, a surprising amount of US files where stashed on computers in other countries, China back in the early 90s omg sooo much