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MultiMC

Consider switching to Prism Launcher or using the MultiMC (auto-update) variant instead for an easier update process.

  1. Click Add Instance

  2. Select Modrinth tab from the left

  3. Select "Fabulously Optimized"

  4. Click on the version dropdown

  5. Select the version that matches your current or has a newer Minecraft version

  6. Click OK. The modpack will now install.

  7. Click that version you just created, then Minecraft Folder

  8. Click the previous version, then Minecraft Folder

  9. Copy the important files and folders over:

    • saves - your local worlds

    • resourcepacks - if you added any (it is not needed to copy the modpack defaults)

    • shaders - if you use any

    • screenshots - screenshots you've taken with F2 or F9

    • servers.dat - your multiplayer servers

    • options.txt - if you want to keep your vanilla option and all hotkey changes

    • Ignore the Copy all 3 folders! file, that's for vanilla launcher users

  10. Close the folders and run the new version

  11. If everything looks right, delete the old version

Never downgrade to an older version, this could corrupt your worlds and settings!

Never update to an alpha or beta from a release version, install a separate instance for testing.

  1. Run the existing version, wait for the progress bar to fill up

    • If you get a popup "This modpack uses new versions of the following...", just click Update.

  2. Check the version difference in the bottom right corner.

Before updating, ensure that the modpack has already been built for that Minecraft version.

  1. Go to the existing instance, click Edit Instance

  2. Go to Settings on the left, then Custom commands

  3. On Pre-launch command, you see a long text. Scroll to the rightmost edge.

  4. It will say something like .../main/Packwiz/1.21.11/pack.toml. Change the Minecraft version to a newer one.

  5. Click Launch.

  6. You should see a popup saying "This modpack uses newer versions of the following..." - click Update.

  7. You're done - the instance is now using an updated Minecraft version.

Never downgrade to an older version, this could corrupt your worlds and settings!

Never update to an alpha or beta from a release version, install a separate instance for testing.

Got asked to download a mod manually?

If you get asked to download a specific jar, it means we are not allowed to bundle it and you must add it manually:

  1. Copy and paste the given address to your browser

  2. Click Cancel Launch

  3. Click Download on the mod

  4. On MultiMC, click on the instance, then click View Mods

  5. Drag the downloaded mod into the mod list

  6. Click Launch

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