# License Activation

### **Personal or business usage**

The PRO version of the Youlean Loudness Meter comes as a single license, with flexible usage terms tailored for both individual and business users.

* **Personal Usage**: For individual users, the license can be applied across multiple personal devices, supporting those who work on various platforms.
* **Business Usage**: In a business setting, the same license is restricted to a single machine but allows unlimited users on that device, making it suitable for team environments or studios where the meter is accessed by multiple people.

This approach ensures that the license adapts to both personal and professional needs.

***

### **Activating PRO version**

The PRO version can be unlocked from either the standalone application, command line tool, or plugins.

* **Purchase PRO Version**: Visit the [official Youlean website](https://youlean.co/youlean-loudness-meter/) and navigate to the purchase section. Select the PRO version and complete the purchase process.
* **Receive Serial Number**: After purchasing, you will receive an email containing your unique serial number.

{% hint style="info" %}
**Your license should look like this:**

EMAIL: <name@example.com>

SERIAL: YLMP-XXXX-XXXX-XXXX-XXXX
{% endhint %}

* **Open Plugin in DAW**: Launch the standalone Youlean Loudness Meter application, or open a plugin inside DAW.

{% hint style="info" %}
Sometimes plugins can have problems accepting keyboard inputs, so the easiest way to register would be using a standalone application.
{% endhint %}

* **Enter Registration Details**: Click the padlock icon in the plugin interface. Enter the email address and serial number. The easiest way would be to copy the details from the received email and paste them into the correct field.

{% hint style="warning" %}
If you purchase multiple licenses, emails could have text appended to it.

Make sure to enter the whole email text for the registration.

**Example 1:**

EMAIL: name\@example.com-license-1

SERIAL: YLMP-XXXX-XXXX-XXXX-XXXX

Enter **name\@example.com-license-1** for the email.

**Example 2:**

EMAIL: name\@example.com.123456789

SERIAL: YLMP-XXXX-XXXX-XXXX-XXXX

Enter **name\@example.com.123456789** for the email.
{% endhint %}

* **Activate PRO Features**: Click on the **"REGISTER"** button to activate. Once you reload the standalone application, command line tool, or plugins, the registration will be fully complete for all plugin formats.

***

### Making license available for all users on a single computer

If you purchased the license as a business, you are required to have a separate license for every machine. You can however make a license available for all users.

{% hint style="info" %}
For more information on how to make licenses available for all users and other advanced licensing options, please [contact us.](https://youlean.co/contact/)
{% endhint %}


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```
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