# Windows
Step 1 – Download the extension
For this example we are using **SuperTables** extension
1. Go to the **Customer Portal**.
2. Navigate to the **Products** page.
3. Scroll to the extension you want to install.
4. Click the **Windows icon** to download the installation package.
Step 2 – Download and prepare the license file
Download the **license file** from the Customer Portal.
Then:
1. Open your **Downloads** folder.
2. Copy the license file to the folder where the extension will be installed.
3. Rename the file to **`license.lic` if needed**.
The filename must match exactly.
Step 3 – Prepare the installation folder
Make sure the installation folder contains:
* The **extension installation files**
* The **license.lic** file
* Your **SSL certificate files**
Next, extract the downloaded extension package:
1. Right-click the downloaded file.
2. Select **Extract**.
3. Extract the files into the same installation folder.
All required files should now be located in the same folder.
Step 4 – Create the configuration file
Open **PowerShell** in the installation folder:
1. **Right-click** inside the folder
2. Select **Open in Terminal**
**or**
1. **Right-click** on the installation folder
2. Select **Open PowerShell window here**
Run the configuration command using the extension executable:
```
.\super-tables-win.exe publish:config
```
Press **Enter**.
\
This will generate the **configuration file** in the folder.
Step 5 – Configure the extension
Open the generated **config file**.
Update the configuration:
* Set the **port number** the extension should run on (for example **8000**).
* Update the names of the **SSL key** and **SSL certificate** files if necessary so they match the files in the folder.
Save the configuration file.
Step 6 – Start the extension
Once the configuration is complete:
1. Navigate to the installation folder.
2. Double-click the **extension executable**.
Windows may ask you to allow access through the **firewall**.\
Select **Allow access**.
If the installation is successful, the extension will start running on the configured port with a valid license.
#### Access the `.trex` file
After the extension server is running, you can access the **`.trex` files** by navigating to:
```
http://localhost:8000/trex
```
The exact URL depends on the **host and port** configured in your `config` file.
Use the `.trex` file from this location when adding the extension in **Tableau Desktop**.
We have a video guide on how to do the installation and a textual guide; see below the video for the textual guide.
{% embed url="" fullWidth="true" %}
Windows inatllation guide
{% endembed %}
