I Lost All Bookmraks After Updating Firefox

After I updated firefox to the newest version, all the bookmarks are lost. I try to restore bookmarks, but unable to process the backup file. in this folder:C:\Documents and Settings\f91\Application Data\Mozilla\Firefox\Profiles\kd1v1uvd.default, I have followed one of the solution I have searched :delete or rename the places.sqlite file and then rename "places.sqlite.corrupt" to "places.sqlite". (If you see any other places.sqlite* files, delete those as well, so that only one places.sqlite file remains.) , but doesn't work. I don't know why places.sqlite.corrupt,places.sqlite-wal,places.sqlite-shm,these files appears again. How can I restore my bookmarks.Thanks