My files and launching LoL

from today 26/05/2019 i've not been able to launch LoL, ive tried to watch alot of yt videos to help me, but every video there has been this RADS file, but i cant seem to find it, i've looked everywhere but cant find it, so i cant be able to restore my game, if anyone has something they think would help me, please say something, because i really want to play. :C
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