Docs: update to v44 guide.

docs/getting-started/licensing/usage-based-billing.md

@@ -94,6 +94,6 @@ We advise linking the email address associated with your plan to a group alias,
 
 ### Plan upgrades
 
-If you are on the Essential plan and reach 5,000 editor loads, you will not be automatically upgraded to the Professional plan. Instead, you will be charged a standard charging rate for each additional block of 1,000 editor loads. To avoid these charges, regularly review your editor load count and consider upgrading your plan if needed. Plan upgrades are available anytime in the `Customer portal` → `Subscription management`.
+If you are on the Essential plan and reach 5,000 editor loads, you will not be automatically upgraded to the Professional plan. Instead, you will be charged a standard charging rate for each additional block of 1,000 editor loads. To avoid these charges, regularly review your editor load count and consider upgrading your plan if needed. Plan upgrades are available anytime in the `Customer Portal` → `Subscription management`.
 
 For plan upgrades, we charge prorated value immediately to enable all needed features after the upgrade.

docs/updating/update-to-44.md

@@ -0,0 +1,67 @@
+---
+category: update-guides
+meta-title: Update to version 44.x | CKEditor 5 Documentation
+menu-title: Update to v44.x
+order: 80
+modified_at: 2024-11-28
+---
+
+# Update to CKEditor 5 v44.x
+
+<info-box>
+	When updating your CKEditor&nbsp;5 installation, ensure **all the packages are the same version** to avoid errors.
+
+	You may try removing the `package-lock.json` or `yarn.lock` files (if applicable) and reinstalling all packages before rebuilding the editor. For best results, make sure you use the most recent package versions.
+</info-box>
+
+## Update to CKEditor&nbsp;5 v44.0.0
+
+_Released on December 2, 2024._
+
+For the entire list of changes introduced in version 44.0.0, see the [release notes for CKEditor&nbsp;5 v44.0.0](https://github.com/ckeditor/ckeditor5/releases/tag/v44.0.0).
+
+Below are the most important changes that require your attention when upgrading to CKEditor&nbsp;5 v44.0.0.
+
+### Required license key configuration
+
+Version 44.0.0 introduced a change in the license configuration. The `config.licenseKey` is now a required property in the editor configuration. Whether you are using CKEditor&nbsp;5 commercially or under open-source terms, you will need to specify this property in your configuration.
+
+```js
+ClassicEditor
+	.create( document.querySelector( '#editor' ), {
+		licenseKey: '<YOUR_LICENSE_KEY>' // Or 'GPL'.
+
+		// ... Other configuration options ...
+
+	} )
+	.then( /* ... */ )
+	.catch( /* ... */ );
+```
+
+* **Commercial licenses**: When upgrading to version 44.0.0 or later, users with a commercial license must update their license key to the [new format](#new-license-key-format). To update your license key, log in to the [Customer Portal](https://portal.ckeditor.com/) and copy the key associated with your subscription into your editor's configuration.
+* **Open-source installations**:
+	* **Self-hosted (npm/ZIP) installations**: If you are self-hosting CKEditor&nbsp;5 under the {@link getting-started/licensing/license-and-legal GPL 2+ terms}, you need to set `config.licenseKey` to `'GPL'` in your configuration.
+	* **Cloud (CDN) installations**: For cloud-distributed CKEditor 5 served via [our CDN](https://cdn.ckeditor.com), you must obtain a license key from the Customer Portal. Create a [free account](https://portal.ckeditor.com/checkout?plan=free) and add the provided license key to your editor configuration.
+
+		During the 14-day trial (automatically activated upon signup), you can explore all Premium Features. After the trial ends, usage metering and editor load limits specific to your chosen plan will apply. Learn more about [available plans](https://ckeditor.com/pricing/) and {@link getting-started/licensing/usage-based-billing usage-based billing}.
+
+Read more in our guides about {@link getting-started/licensing/license-key-and-activation license keys} and {@link getting-started/licensing/usage-based-billing usage-based billing}.
+
+### New license key format
+
+A new license key format has been introduced. Previous license keys **will no longer work** after updating the editor to version 44.0.0 and above.
+
+Acquiring new keys:
+
+1. **Access the Customer Portal**: Log in to the [Customer Portal](https://portal.ckeditor.com/) to obtain your new license key.
+2. **Update configuration**: Replace the old license key in your editor configuration with the new key.
+
+For more information or assistance, please refer to our {@link getting-started/licensing/license-key-and-activation documentation} or [contact our support team](https://ckeditor.com/contact/).
+
+### Self-service plans and new Customer Portal
+
+The new self-service plans make accessing CKEditor Premium Features easier than ever. You can now choose the plan that best suits your needs and get started quickly with commitment-free trials.
+
+Plans are managed through a new, dedicated [Customer Portal](https://portal.ckeditor.com/), where you can access license keys, track usage, manage billing, and submit support requests-all from one place.
+
+Learn more about the [different plans available](https://ckeditor.com/pricing/) or start your [14-day free trial](https://portal.ckeditor.com/checkout?plan=free).