> For the complete documentation index, see [llms.txt](https://docs.securemetrics.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.securemetrics.io/crq-pro/getting-started/installation.md).

# Installation and activation

## Install

CRQ Pro is a desktop application. Download the installer for your platform and run it. Windows builds are code-signed.

## Activate

CRQ Pro requires an active license. The first time you launch the app you will see the **Get started with CRQ Pro** screen with two options:

{% tabs %}
{% tab title="Start a free trial" %}
Click **Start 14-day free trial**. This opens a checkout page in your browser.

{% hint style="info" %}
Card required. Cancel anytime before day 14 for no charge.
{% endhint %}

After checkout you will receive a license key by email. Enter it in the app to activate.
{% endtab %}

{% tab title="Activate a license key" %}
Paste your key into the license field (format `XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX`) and click **Activate**.
{% endtab %}
{% endtabs %}

### One device per key

Each license key can be active on one device at a time. To move to a new machine, remove the license on the old one first: **Settings > Application > License > Remove**. This releases the seat immediately.

### Working offline

CRQ Pro verifies your subscription online at launch. If the license server cannot be reached, the app keeps working for a **14-day offline grace period** from the last successful check. While offline you will see a small badge: "Offline. Verified access for N more days." After the grace period expires, reconnect to the internet and relaunch to verify.

### Managing your subscription

Go to **Settings > Application > License** to:

* See your license status and the last 4 characters of your key
* **Manage license**: opens your billing portal in the browser
* **Change key**: activate a different key on this device
* **Remove**: release this device's seat

## Updates

CRQ Pro checks for updates on launch.

* With **Automatic updates** on (the default), new versions install on launch and the app relaunches.
* With it off, a notification appears when an update is available and you choose when to install.

Change this under **Settings > Application > Updates**, where you can also see your current version and run **Check for updates** manually.