After I had installed Firefox version 4 on my Vista, I noticed that the Version 3.6.x still existed (which I was not expecting). So I decided to uninstall version 3.6.x and as i thought it was an independent installation and I had imported my bookmarks etc. to version 4.x, I pressed yes to "delete personal data" so now all my bookmarks,settings etc. are gone. Unfortunately the last bookmark backup is more than 2 years old.

Is there any possibility to restore my personal data either to a version 3.6.x or to the version 4.x