After rebooting one day, the Bitdefender main window indicates that the Mac is not protected. When clicking on the "log in" in the main window, the Bitdefender Central tries to open, but closes instantly. Open my browser and log in to the Bitdefender Central confirms that I have active subscription and my macbook is protected. After quit the program and re-open the Bitdefender, it is still "not protected". The "my account" in preference does not show anything as if it is logged in. Basically I can log in on a separate browser Bitdefender Central website, but not within the Bitdefender's application. Can anyone help?