If you installed v. 1.0 over an earlier version (which it sounds like according to your post), it probably would be better to do a fresh install. Uninstall Firefox from Control Panel -Add/Remove. Go to C:/ program files and remove the Mozilla folder (if it is still there)-remove your present profile - and then reinstall v. 1.0.
To remove your profile (you must have hidden files set to show)-Click on My computer - C drive -Documents and Settings -your name -Application data-Mozilla-you can remove the Firefox folder - or you can click on it and remove the Profile folder.
To remove your profile (you must have hidden files set to show)-Click on My computer - C drive -Documents and Settings -your name -Application data-Mozilla-you can remove the Firefox folder - or you can click on it and remove the Profile folder.