I am using Thunderbird on Windows XP Pro. Recently i upgraded the thunderbird to Tb 3.1 from 2.x I can see that all my sub folders have disappeared. The 'Unified Folder' tab shows basic folders, however 'All Folders' tab does not show any folders at all.
Fig 1 shows the folders in 'Unified Folders' tab:
To explain my problem better, i have included the images.
Fig 2 shows the folders in 'All Folders' tab: