There are multiple reasons why we might need to remove a ThinApp assignment from an individual desktop or Horizon View desktop pool.
The process used to remove a ThinApp assignment is similar for both desktops and desktop pools.
Navigate to Resources | Machines in the Horizon View Manager Admin console and search for the target desktop.
Double-click on the target desktop to bring up the desktop Summary page.
In the ThinApps window of the desktop Summary page, highlight the target ThinApp to be removed, and click on the Remove Assignment button as shown in the following screenshot: