What is wrong with Quartus II?

Well, the problem is not a problem of compilation at all!

The problem is that I spend more time waiting for Quartus to allow me doing something that waiting for a compilation to complete (even compilation times are already rather long though...).

Example of the day: I've done a compilation (which I'm completely sure is over), converted programing files, programed the device (it's a MAX10), ran the system (can thus confirm that compilation was completed), found a problem and then came back to Quartus in order to add lines to signal tap, to verify my timing. And this is the start of long long waiting time.

Windows mention (Not Responding) in the application bar. Each time I click on whatever button, I get a rolling cursor for minutes before the action can be performed...

Only solution: kill the application and start it again.

I'm thus good for a couple actions and then back in troubles...

I think this will end by a clean re-install of Quartus... but not even sure this will help.