Launcher updated without asking for it.

I was starting Minecraft Launcher. Ok, it downloads these 40mb again, like it was doing it before because of a bug (huh). So, i wait until it downloads, then... "Surprisssssssse! Minecraft launcher has been updated!" Fuck you. I didn't ask for it. This forced update was because of fucked up microsoft, right? Give me a way to down-grade it to previous version, or Fuck yourself Mojang.