I am trying to export my thunderbird mails and mail accounts from my old win7 32bit to a new win7 64 bit. Both have the same version (16.0.1). Earlier in this situation I just copy the Thunderbird folder found under my user data account (tried both local and roaming), but this is not working in this scenario. I also tried to use Thunderbird export/import function, but it gives me a blank screen. This is what I am talking about: