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I am unable to completly uninstall Master Password+ from Firefox 3.6.13

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When I try to completely uninstall Master Password+ and restart Firefox Ver 3.6.16 the Master Password+ still shows up on the add-on list and states that it will be removed after I restart Firefox. I have restarted Firefox and rebooted my computer without success.

When I try to completely uninstall Master Password+ and restart Firefox Ver 3.6.16 the Master Password+ still shows up on the add-on list and states that it will be removed after I restart Firefox. I have restarted Firefox and rebooted my computer without success.

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This may be caused is one of the files that stores details of installed extensions is corrupt. If one of those files is corrupt it can cause problems installing/uninstalling add-ons and can stop them from working. First follow the procedure in the "Corrupt extension files" section of the Unable to install add-ons (extensions or themes) article to delete those files, then try uninstalling the Master Password+ add-on. If you are still having problems, try the procedures shown in the Cannot remove an add-on (extension or theme) article.