When the new launcher overhaul version became available, my then current launcher told me to restart Minecraft for it to automatically install the update, but not only did that not work, but restarting my OS didn't work either, and when trying to reinstall the launcher entirely (to install with the latest version right out of the bat) the launcher wouldn't boot up at all, giving me the message "Unable to start the Minecraft Runtime Enviroment. This is most likely caused by a corruption. Please try to reinstall Minecraft.". I tried using the installer's repair feature, it didn't fix the issue, i tried reinstalling it altogether, didn't fix it either.