Italian GHQ is in area down near Grenoble, "Chamb,ry." I had noticed I can now build 2.4.5 fighter units in some of my nations, and I wanted to select the Italian air squadron that is attached to the Italian GHQ (I Sqd Fighter) to see if there are ways to upgrade them or something.
I double-clicked on the air unit icon and got a Windows error screen saying WWI has encountered and error and must shut down.