probably by getting rid of your antivirus product. I have basically nothing to run with. But most folk that loose their profile as you have done have issue with antivirus products. Those that get certificate error also usually have antivirus error. That you have experienced both makes me think you have a bad apple in your antivirus. You may be able to recover your previous setting by going to the troubleshooting information on the help menu and selecting About:profiles. From there you can open your old profile, or at least find out what the issue with using it is and report that here for advice.