How to update FO
Disclaimers
As with any update, things may break. Probably not due to the modpack itself, but maybe your launcher, your custom mods or your hard drive. If worried, make backups.
Upgrades from stable to unstable (alpha, beta) versions are never supported (make a separate instance!), while updates from unstable versions to stable ones are.
Any kind of instance downgrading is never supported. Make a separate old instance or use something like ViaFabricPlus if your server hasn't updated yet.
If you follow these instructions properly, all custom mods and most mod settings you have will persist (except those that need to change). If you want, you can reset your settings to get the latest changes.
CurseForge App
If you haven't changed the mods:
Select Minecraft from the grid or sidebar
On My Modpacks, right click Fabulously Optimized, then
⇄ Change Version
Don't see that option? Follow the other instructions below.
Select the topmost version, then
Continue
.Modpack will now update.
Run it and check the version difference in the bottom right corner.
If you added or removed some mods:
Select Minecraft from the grid or sidebar
On My Modpacks, click Fabulously Optimized
Click
⫶
→Profile Options
Uncheck "Allow content management for this profile". You can re-enable content management after the update.
Click
Continue
Click
⫶
→⇄ Change Version
.Select the topmost version, then
Continue
.Modpack will now update.
Run it and check the version difference in the bottom right corner.
Modrinth App
Select existing FO instance
Click
🔄 Update modpack
on top rightSelect latest version and click
⇆
Prism Launcher
Select existing FO instance
Click
Edit
on the sidebarSelect
Modrinth
on the tab listClick
Update pack
Once the name prompt comes up, click
Yes
MultiMC
Click
Add Instance
Select
Modrinth
tab from the leftSelect "Fabulously Optimized"
Click
OK
The modpack will now install.
Click that version you just created, then
Minecraft Folder
Click the previous version, then
Minecraft Folder
Copy the important files and folders over:
saves
for your local worldsresourcepacks
, if you use any (do not copy old versions of FO-bundled packs though)screenshots
servers.dat
for your multiplayer serversoptions.txt
, if you want to keep your vanilla option changesIgnore the
Copy all 3 folders!
file, that's for vanilla launcher users
Close the folders and run the new version
If everything looks right, delete the old version
MultiMC (auto-update)
In most cases:
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
.
Check the version difference in the bottom right corner.
If there is a new Minecraft version:
Drag the ZIP-archive to MultiMC window
Click that version, then
Minecraft Folder
Click the previous version, then
Minecraft Folder
Copy the important files and folders over:
saves
for your local worldsresourcepacks
, if you use any (do not copy the Mod Menu Helper though)screenshots
servers.dat
for your multiplayer serversoptions.txt
, if you want to keep your vanilla option changesIgnore the
Copy all 3 folders!
file, that's for vanilla launcher users
Close the folders and run the new version
If everything looks right, delete the old version
Minecraft Launcher (vanilla)
Currently the only way to update is to "reinstall" the pack. Consider installing a different launcher for a smoother upgrade experience.
Download and install Fabric Loader version 0.15.10
Remember that the installer version doesn't matter, what matters is the loader version that appears when you run the installer.
Open Minecraft Launcher, click
Installations
, then click 📂 on the Fabric installationOpen this site and click on the version you want
If you got a prompt for popup windows or multiple downloads, please accept it - technical limitation.
Open the zip file and copy all folders (why?) to your .minecraft folder
If asked - replace the files.
Recommended: delete
options.txt
to get FO default settingsYour vanilla options like selected resource packs, language, keybinds will be reset but you can reapply them later.
If you choose not to do this, please at least enable bundled resource packs manually.
Launch the installed Fabric profile
If you now see "Fabulously Optimized" in the right bottom corner, you're done!
GDLauncher
No longer supported. Please migrate to Prism Launcher.
Updating mods
If you are using a supported version of Fabulously Optimized and you haven't added any extra mods, do not update any mods manually, just update the modpack instead.
If you did add extra mods, update those individually after you've ensured you're on latest version of Fabulously Optimized.
Updating mods that are in FO may cause unexpected issues which FO releases would prevent, so manual updates only make your own life harder.
If you are using an unsupported (legacy) version of Fabulously Optimized, you may carefully update the mods.
Keep in mind that we haven't tested those updates, so you may run into issues and need to revert back to previous versions.
Some launchers have options to update all mods at once. Do not use this feature for reasons listed above.
Even for legacy versions of FO, updating everything at once like that may cause problems like mod loader mismatch, Minecraft version mismatch, mod platform variances (more recent version on one platform vs another) and so on.
It is always safer to update each mod individually so that you can see the update was successful and valid for your MC version/mod loader.
If you did any of the things above and are having issues, simply update Fabulously Optimized again.
This will reset your mod list to the specified FO version ones, even if you used the same version of FO beforehand.
Resetting options
Because the pack is using YOSBR, your vanilla options and most of the mod ones will not change when you upgrade, despite what is stated in the changelog. This is made so that you can upgrade without having to reconfigure your options all the time.
However, at some point you may still want to do that in order to get the latest changes. So:
Open the modpack folder
CurseForge Launcher: right click on the modpack tile →
Open Folder
Prism Launcher: right click on the instance →
Folder
→.minecraft
MultiMC: right click on the instance →
Minecraft Folder
Vanilla launcher: go to
Installations
tab → hover on the instance → click📁
Delete the
config
folderIf you prefer, also delete
options.txt
which stores vanilla options
Rename the file to
pack.zip
Open the file you renamed, go to
overrides
Copy/extract the folder
configs
out to the modpack folder you previously openedYou may delete the
pack.zip
after you're done
Launch the game. Modpack's defaults are now applied!
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