Modrinth App

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.

1. Open the Modrinth App

2. Click on the Library section

3. Select the existing FO instance

4. Click on the Update modpack button on the top-right

5. If you do not want the latest version, select the version you want from the dropdown

6. Click on the two-arrows button. FO should get updated

7. Once updated, launch the instance. Minecraft should open up

8. If you can see the newly installed version in the bottom-right corner, you're done!