Nimbus
Getting started

Sign in with license key

Activate your key, understand the HWID binding, and what each field on the sign-in screen actually does.

Where to find your key

Your license key is in two places:

  1. The SellAuth receipt email sent immediately after checkout.
  2. The customer dashboard at /dashboard — sign in with the key once and your future-self can copy it from the Licenses tab.

Keys look like nimbus-AbCdEfGh1234 — five segments, twenty chars. There is no whitespace in a real key; if you copied trailing spaces from an email line wrap, paste into a text editor first.

First activation

The first time you paste a key into the loader and click Sign in:

  1. The loader hashes the contents of HKLM\Software\Microsoft\Cryptography\MachineGuid plus a few other stable hardware identifiers.
  2. It posts {key, hwid} to our auth backend at keyauth.win (the same provider the live product uses).
  3. The backend records that hash as the HWID lock for your key.

From that moment on, the key only works on this exact PC. If the hardware fingerprint changes, the auth call fails with HWID does not match.

What HWID binding means

The hash is one-way — we never see your actual hardware. We see a 64-char hex string that is statistically unique to your machine but cannot be reversed to "John's PC" or "GPU = RTX 4090".

The hash usually changes when:

  • You replace your motherboard or CPU.
  • You reinstall Windows from scratch (registry MachineGuid is regenerated).
  • You swap your primary storage drive with the boot partition.

It does not change when you reboot, swap your GPU, or add RAM.

See How to reset HWID for the recovery flow.

"Remember on this PC"

The sign-in screen offers a Remember me toggle. When ticked, the loader saves an opaque session token (not your key) in config/session.json and reads it on every subsequent launch. The token is bound to the same HWID; copying it to another machine does nothing.

Leave this off on shared computers.