> For the complete documentation index, see [llms.txt](https://documentation.astera.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.astera.com/astera-data-stack-v9/setting-up/licensing-model-in-astera-9.md).

# Licensing Model in Astera 9

### Single license key model

The license key provided to you contains information about how many Astera clients can connect to a single server as well as the functionality available to the connected clients.

{% hint style="info" %}
**Note**: You cannot use your existing set of keys (from version 6 or 7). If you are planning to migrate from version 7 (or earlier) to version 8 or 9, please contact [sales@astera.com](mailto:sales%40astera.com), as you will need a new license key.
{% endhint %}

{% embed url="<https://youtu.be/ZWpayouhIts>" %}

### Unlocking Astera 9 using your license key

After you have configured the server, and logged in with the admin credentials, the last step is to insert your license key.

1. Go to *Tools > Manage License*. Or you can access the *License Management* window from the *Server Explorer*.

<figure><img src="/files/kaqCFRGILkPhoDdF3bGf" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/WABvLtYnKlpZAyZdujgQ" alt=""><figcaption></figcaption></figure>

2. On the *License Management* window, click on *Unlock using a key.*

<figure><img src="/files/wiRxaX1nGvME1vsiN7sw" alt=""><figcaption></figcaption></figure>

3. Enter the details to unlock Astera – Name, Organization, and Product Key and select *Unlock.*

<figure><img src="/files/5b3QE7LYyPy1ZaNUcdgI" alt=""><figcaption></figcaption></figure>

4. You’ll be shown the message that your license has been successfully activated.

<figure><img src="/files/Lf0wEaR4XztCFW8PSdmv" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
**Note:** The connected client applications will shut down for the server license to take effect.
{% endhint %}

<figure><img src="/files/7JV3lKpPbwgfd0nYV7ef" alt=""><figcaption></figcaption></figure>

If you go to the *File* menu now, you’ll see all the options (Dataflow, Workflow, Subflow, etc.) enabled.

<figure><img src="/files/x04lNa7e8ajndCtCVI8M" alt=""><figcaption></figcaption></figure>


---

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