--- title: "Legacy License Keys Activation" canonical: "https://documentation.chaos.com/space/ERHINO/127832020/Legacy%20License%20Keys%20Activation" format: markdown --- ## **Overview** --- Enscape version 4.1 uses a new licensing system that requires authentication with a [Chaos account](https://documentation.chaos.com/space/ERHINO/153288743/Chaos+License+Quick+Start+Guide). If you are a single license holder, you will be prompted to login during installation, or you can log in directly from within Enscape. If you are sharing licenses, you can enable the [Cloud-based Floating License](https://documentation.chaos.com/space/LIC5/124524692/Cloud-Based+Floating+Licensing) feature in your Chaos Account Portal. Click [here](https://documentation.chaos.com/space/ERHINO/153288743/Chaos+License+Quick+Start+Guide) to learn more about managing your user account. ## **Chaos License Server** --- --- ## **License Setup** --- The Unified Login Application (ULA) is integrated into the License Server installation. The ULA allows Single Sign On for all ULA-integrated Chaos desktop apps. Signing in to any of the Chaos applications will automatically log the user in all other Chaos applications installed on the machine. - Local – Single license holders of fixed licenses can use the default installation option, which installs a local License Server on their device. For the Local installation type, an installation and activation is required. ### **Activation for Single License Users** --- - Cloud-based Floating License – Enabling the Cloud-based Floating Licensing allows you and your team to use a shared pool of Floating licenses entirely through the Cloud. This allows users to use licenses from any location without the need to be on the same local network or connect to an office network through a VPN. ## **Enscape Versions 4.0 and Older** --- --- --- --- --- --- ## **Remove a License Key** --- --- If you have reinstalled the operating system without removing the License Key beforehand, or if you have uninstalled the CAD and therefore can no longer access the Enscape Account button > Macro (inline-media-image) to deactivate the license, even though Enscape is still installed on the machine, or if you have problems with activating / deactivating your Enscape License Key in general, even after checking your [proxy settings and firewall exceptions](https://docs-chaos.atlassian.net/wiki/spaces/ERHINO/pages/127767683), then please contact support through the [Help Center](https://support.enscape3d.com/).