ACLClouds
ACLClouds

How do I change the Minecraft or Java version?

Choose a compatible version, back up, then reinstall or switch the Java version.

The Version page groups the Minecraft version and, for compatible server templates (eggs), the Java version. A wrong combination often causes an immediate shutdown.

Step-by-step procedure

  1. Create a backup

    Back up the world and configurations before any version change.

  2. Check compatibility

    Check the versions supported by the server template, the plugins or the modpack.

  3. Choose the version

    Open Version, select the target version, then confirm. The panel chooses the suitable Java image when this feature is available.

  4. Read the logs

    After restarting, look for the “Unsupported class version” error, an incompatible plugin or a world created by a newer version.

Risky rollback

Opening a recent world with an older version may delete or corrupt data.