I've updated to 8.0 and now firefox will not open and I get an error message indicating that 7.0.1 is not compatible with version 8.0 of the Min and max version 8.0. What can I do now?

I tried to uninstall 7.0.1 and reinstall only and still it would not to date and problems such as the loss of my favorites and have different toolbars and Add ons whenever I opened it. I lost so many bookmarks and it became so frustrating that I decided to try to upgrade to see if that could overcome the problems. And now I have this problem. When I did a search on my hard drive to see the components of firefox how was I found firefox files and documents in all directions and I was wondering if I should just delete everything related to firefox to clean all residual files which could be causing problems and then start a clean download , but I didn't want to delete files in windows and didn't know what I should delete and I have to leave. Can anyone help? I miss my firefox and the wish that I had never upgraded to 7.0.1.

If you use ZoneAlarm Extreme Security then try turning off virtualization.

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