You can find the last Citrix Receiver / Workspace version on this URL
Click on “Download for Windows” to get to the last version website
Now you will get information about the last Citrix version available. Just download it by using the icon “Download Citrix Workspace app for Windows”
If you are using Google Chrome, you will get the downloaded file on the bottom left corner (Like this picture). Just click on it. If you use Edge as your browser, you will get a prompt to open or save the file, click on open.
Accept the UAC (User Account Control) pop-up if you got it