can't install Software Updater on Endpoint Protection Suite Plus clients

I used the avast_managed.exe from the server to install the client on two workstations, but the Software Updater is greyed out, not installed… Why? and how to install it?

If I try to use the avast_managed.exe again, it changes the workstation license to a Demo… and I have to remove it all and start over. But still no Software Updater. It worked well in the Free versions. What is going on? This is NOT a Demo license, but a paid version…