Note: you can not / must not avoid the automatic add-ins deploy when using ClickOnce!
Which client computers require to avoid the automatic add-ins deploy?
Only the client computers where you review and modify the script require avoiding of the automatic add-ins deploy.
On such computers make sure to start Ted4, Fred4, Admin4 and Shell4 exe through a shortcut that contains the /noaddinsautoupdate switch (see GN4 applications command line parameters for more info).