Copying Thunderbird Mails and Address Book from Ubuntu 10.04 to 12.04

I am running Ubuntu 10.04 on my office Laptop since April 2010. When Ubuntu 12.04 came I considered distribution upgrade but decided not to do it since I was running latest versions of Libreofice, Thunderbird, Firefox using Launchpad PPAs. My only problem was to transfer the Mails and Address Book in Thunderbird. The other problem was to resize the big NTFS partition to install Ubuntu 12.04 on a new partition. I solved the NTFS resize problem as described on this post.

For copying Mails and Address Book I copied  xxxxxxxx.default folder and profiles.ini file from/to .thunderbird folder from Ubuntu 10.04 to 12.04 and it works perfectly.

Now I am using Ubuntu 12.04 on my office Laptop.