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First start

The first time you launch Qomicex, the setup wizard opens and takes a few minutes to configure the basics.

Two modes

Wizard steps

  • Language — Choose the interface language. It applies immediately and can be changed in settings at any time
  • Theme — Dark / light, switchable in settings at any time
  • Directories (custom mode only) — The data directory holds launcher configuration; the game directory (.minecraft) holds game files
  • Download source (custom mode only) — Each source is speed-tested automatically and the lowest-latency one is selected; you can also tick “Auto-select the best”
  • Java runtime — The launcher needs four core runtimes: Java 8 / 17 / 21 / 25. It deep-scans your machine automatically; missing versions can be downloaded online with one click
  • Memory — Automatic allocation is recommended (calculated from available system memory); you can also set the maximum memory manually
  • Finish — Review the configuration summary and start using the launcher
You can skip Java setup in the wizard, but some game versions may not start if your Java environment is incomplete. You can add them later in Settings → Java runtime. No need to download anything again. On the home page, go to the instances page, click Import and select your existing .minecraft directory to take over existing versions. See Install a game → Migrate an existing game.

Common startup issues

See FAQ; if a problem remains unsolved, submit it via Report an issue.