Firefox has disabled flash player with a "Flash player has been disabled for your safety" message, and the option to update Flash Player. When I try to do that, the process starts by downloading AdobeFlashPlayerInstaller_11_aih.dmg. I close all browsers, run the installer, but it always gives me the error message: "Please quit the following programs to continue. Safari", even though I don't use safari and don't have it open. I've tried rebooting, error persists.
Other ways to troubleshoot?