dongle is inserted but scada run in demo mode

It looks lioke you are eligible for version 8.2, but are only at 8.0 on the key.  I get very conbfused when the 2016, 2018 nomencalature gets used, so I haven;'t really looked at this as your problem.

If it continues after a key update, update the drivers.

Also - there is a bit about Vijeo Citect VS Citect SCADA .  Make sure you update to the correct one for your installation.

You could also run the Setup Wizard from the Studio. Make sure on this screen it is set for Server and Control Client so it is looking for a Full license (which you have). If you have Control or View-Only selected, it won't find the license since you don't have a control or v/o license.

Also, look in the Logs folder, and open syslog.dat in Notepad. At the bottom you should see messages about what is wrong with the license.