Updating FFXI Client Files

Assuming you’ve already downloaded and installed the FFXI client from SquareEnix, you’re ready to connect and begin updating your files.

First Time Installation


Before you start, verify that you have the following installed for FFXI, PlayOnline, Ashita and/or Windower.

Configuring PlayOnline and Updating

  1. Open PlayOnline and let it update (and restart it if it asks).

  2. PlayOnline will prompt you if your a New User or Existing User. Choose For PlayOnline Members.

    PlayOnline - Welcome

  3. Set ABCD1234 a the username, password, and account ID for your new account. This just allows you far enough in to access the file check. A valid PlayOnline or SquareEnix ID is not required.

    PlayOnline - Welcome

  4. On the left side of the screen, click Check Files.

    Check Files

  5. On the Check Files Screen screen where it says “PlayOnline Viewer”, select the down arrow to select “FINAL FANTASY XI”.

    • NOTE: If “Final Fantasy XI” doesn’t show up, you can download a patch from the DSP team to resolve the issue. Read here.

    Choose Final Fantasy XI

  6. Click the Check Files button with “FINAL FANTASY XI” highlighted to begin the check.

  7. This process is validating your current files and should take 20-25 minutes depending on your computer’s hard drive speed. Once complete, it’ll prompt you to begin the update to fix errors (errors meaning files that don’t match current retail). Choose to “Fix the errors”.

  8. PlayOnline will start checking and updating files. This can take 2-4 hours depending on your computer speed and internet connection.

  9. Once everything is updated, exit PlayOnline.

  10. The last step is copying the PlayOnline Viewer’s data folder into the FFXI folder.

    1. Navigate to \PlayOnline\SquareEnix\PlayOnlineViewer (or to where you installed FFXI) and copy the \data folder.
    2. Navigate to the \PlayOnline\SquareEnix\FINAL FANTASY XI folder and paste that folder in that folder.
    3. You should now have a \data folder in your \FINAL FANTASY XI folder.

You’re done and ready to configure your windower client with either Windower or Ashita.

If you’re coming from the Nasomi player community or have ever used their installer, there’s a process to patch your installation to work with “retail” Final Fantasy XI. You can see the full instructions here: https://nasomi.com/wiki/index.php?title=Config:Installing#Retail.2FNasomi_swap.

Client Updates/Patches

When the server updates to a new client version, players need to update their client to be inline. Here’s a quick guide to ensure a smooth update.

Unless you’re using Ashita’s DATS, XIPivot, or another tool to manage your third-party HD dats, a client update will override these files. Be sure to have a backup before starting.

  1. Navigate to the \FINAL FANTASY XI\ROM\0 directory and delete 0.DAT. Deleting this file forces FFXI to update.
  2. Open the PlayOnline Viewer.
  3. On the left side, click Check Files.
  4. In the dropdown, select FINAL FANTASY XI.
  5. Click Check Files to begin the process.
  6. It will find several files “corrupt” or out of date, choose to “fix the errors.
  7. Once the process is complete, close PlayOnline Viewer and log back into the game.