Hi Walkers!
PLUS+1 Update Center is seperate from everything else but is by default automatically started at start up of your computer. When started in this way, PLUS+1® Update Center will run in the background. Click its icon in the system tray to open the main window again. This setting can be set under Setup -> Options in Update Center. When it's on you should be able to see the symbol down in the right corner of your screen in the system tray. For Update center to be able to check for updates it needs to be running and if there are any new updates available it will show a notification as a pop-up down to the right of your screen. There is a short manual on PLUS+1 Update center that I've attached.
I hope this helps!
Best regards
Nilla
PLUS+1 Helpdesk team