first i use the english version thunderbird but due to system had problem so i use the recover function( windows Vista) and recover system ! but suddenlty i found that thunderbird was unable to work ! so i download setup progrma again(but this time i download ct version) reinstall it to the same floder! but i found all the old mail are disappear? how come? where can i found it! and if i wish to export the account setting so i can use it at another NB , how shall i do? can any one help me? thanks!