You will only need to install this client once your computer. This is an optional procedure that has the following benefits: Citrix Workspace app is a new client from Citrix that works similar to Citrix Receiver and is fully backward.
While you can still download older versions of Citrix Receiver, new features and enhancements will be released for Citrix Workspace app. If you have already installed the Citrix Workspace App and are logged into Virtual Desktop, you can 'activate' it on Windows or Mac OS. Beginning August 2018, Citrix Receiver will be replaced by Citrix Workspace app. What is 'Activating the Citrix Workspace App' and Why Would I Want to do it?