DOCUMENTATION / KEEP PLAYING
Updates, backups & recovery
Review pack changes before publication. Updates, rollback and interrupted-update recovery use supported workflows with retained backups.
Protect your worlds first
Close Minecraft and the official launcher. Keep a separate backup of worlds and irreplaceable data outside the active game folder. Update backups need free disk space and are not automatically cleaned up.
Choose the pack version
In Library, select the pack and open More → Update pack. Supported managed FTB, ATLauncher, Modrinth and newer Technic installations with usable stored identities open their own version pickers. Other packs retain a catalog/archive chooser. Import update archive remains available.
The installed version starts selected where identified. Choose another version and Prepare update. A recognized same-version selection shows Already up to date without preparing pack content; use Reinstall / repair explicitly when that is your intention. Raw archives and missing identity metadata still need preparation and inspection. CurseForge retains its existing authorization limits.
Review each change
The review shows versions and changed files. Local changes and custom files default to Keep local. Choose Use pack or Remove only when appropriate. Older instances without a publisher baseline conservatively retain unknown files, which can leave an obsolete mod needing attention.
Confirm both apps are closed, then select Back up and update. Keep the game closed until it finishes. Afterwards use Play via Minecraft Launcher to review/save the updated official profile before pressing Play there.
Verified FTB reuse
Supported FTB files matching the incoming publisher size and checksum are copied into independent staging. Changed, missing or unverifiable files download normally. Other providers do not inherit this reuse guarantee.
Review a rollback
Open More → Updates & backups, choose a completed update and Review rollback. This restores prior pack files/pins through a reviewed transaction while preserving current worlds and local changes. It also retains the installation being rolled back. Check world/mod compatibility before playing.
Recover an interrupted update
Open Folders → Update recovery & backups, including when an interrupted swap temporarily hides a pack from Library. With both apps closed, select the unfinished transaction and Recover interrupted update. Changed or unverifiable trees can require manual preservation instead of automatic recovery.
Do not delete an unfinished transaction to dismiss its guard, or mix files from different pack versions manually. Preserve backups and ask for help if recovery is blocked.