Codex Skin Library
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Windows client guide

From installation to a complete restore

This guide covers your first use of Codex Skin Client. The installer is public, while your skin library syncs after you sign in.

01

Download and install

  1. Open the client download page and select Download for Windows.
  2. Run CodexSkinClientSetup.exe and follow the installation prompts.
  3. If Windows shows an Unknown publisher warning, compare the installer with the SHA-256 value on the download page. This first release is not commercially code-signed yet.

No account is required to download. The installer is public and has no download limit. Create an account or sign in after installation.

02

Create an account or sign in

  1. Open Codex Skin Client.
  2. If you already have a website account, enter the same email and password and select Sign in.
  3. If you are new, enter an email and a password of at least eight characters, then select Create account.
  4. If you receive a verification email, confirm it before returning to the client to sign in.

Your session is protected with Windows user-level data protection. The client never stores your password in a local file.

03

Apply a skin from the website

  1. Save or send any unfinished input in Codex.
  2. Open an unlocked skin page and select Apply in Codex.
  3. If needed, sign in to the client. It keeps the requested skin selected.
  4. The client syncs your library, downloads and verifies the exact skin, then shows one safety confirmation.
  5. Select Yes. The client safely restarts Codex and applies the skin.

You can still choose a skin manually in My Library when you want to adjust brightness, content dimming, or motion speed first.

Free built-in skin: Future Planet: Twin-Sun Sand City needs no purchase or download and uses the same one-click flow.

Applying a skin opens a local debugging port that listens only on 127.0.0.1. The client does not modify WindowsApps, app.asar, account data, or model settings.

04

Restore and troubleshoot

Restore the official appearance

  1. Open the client and select Restore official appearance from My Library or Appearance settings.
  2. After confirmation, the client removes the active skin and debugging port, then restarts Codex normally.

A purchased skin is missing

Confirm that the website and client use the same account, then select Sync library. If the purchase just completed, wait a few seconds and sync again.

The download button says Waiting for asset sync

Your purchase is active, but the original asset metadata is still syncing. Try again later. The client will not charge credits again.

Codex is not detected

Install the official Codex Windows app from Microsoft Store and launch it at least once, then select Detect Codex again in Appearance settings.