Soo, I've decided to downgrade my 3DS, (i never used it in a long time)
The steps i did was:
MY 3DS VERSION: 9.8.0-25U (at start)
1) on the homebrew channel(after all the browser exploit) i installed MenuHAX
2) after that i loaded the homebrew channel with MenuHAX
3) opened Sysupdater and...