# Licence Installation

> The endpoint used during licensing is [https://api365.slascone.com:443](https://api365.slascone.com:443). A connection to `20.126.54.190` (`api365.slascone.com`) on port `443` is required.

Depending on your network configuration, you may need to add this endpoint to your firewall allow list.

If your CAXperts application does not have a valid licence key, the **Update licence** dialogue appears each time you start the application.

<img src="./media/images_image4.png" width="562" height="434">

This dialogue shows the current domain name of your host. The domain name may be needed if you want to purchase a new licence key.

If you want to deactivate an existing key, for example to switch keys, click *Deactivate*.

Then enter your new licence key in the input box and click *Activate*.

<img src="./media/images_image5.png" width="562" height="434">

After the licence has been activated, the licence information is shown. If there is an error, for example if the *Demo* button does not disappear, please contact `support@caxperts.com`.

If the licence was activated successfully, click *Close* to close the window and start using your application.

> The licence setup needs to be completed only once per host. All CAXperts applications use the same licence key, and activating it in one application activates it for all CAXperts applications on that machine.