Minecraft Launcher
You should ALWAYS make backups before updating.
As with any other piece of software, updates may go wrong for many reasons, including but not limited to: the launcher, the hardware, your custom configuration, the mods you added... and, rarely, FO as well.
Follow the installation instructions again.
You may find a paigaldaja_meta.json file in the same folder as the installer. Don't worry: this is just a configuration file for smoother future updates.
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