After connecting a projector on my computer, screen resolution has changed accordingly to video output (from 1920x1080 to 1024x768). But that's not really a problem.
The problem is, now -- at high screen res --, when a window or a common dialog is opened, it is located at the top left corner of my screen. I guess this is due to last window size and position at low screen resolution.
How can I reset default windows start position (to be centered)?