It is possible that everything is still there but Thunderbird is not pointing to the correct locatio

It is possible that everything is still there but Thunderbird is not pointing to the correct location, so appears blank.

Profile folders are hidden folders.

Make hidden folders and files visible:

http://kb.mozillazine.org/Show_hidden_files_and_folders

Look to see if Profile folder is still there; info at this link to locate folders. If there is more than one Profile folder, check all profile names to see which has the mail accounts.

http://kb.mozillazine.org/Profile_folder_-_Thunderbird

eg: C:\Users\user name\AppData\Roaming\Thunderbird\Profiles\Profile name\

then if Pop mail account look in 'Mail' folder for mail account name or if IMAP mail account 'IMAPMail' \ mail account name.

If you can see this, make a note of where it is.

Then in thunderbird,

'Tools' > 'Account Settings' > 'Server Settings' for the mail account

Look at the bottom on the right side for 'Local Directory:'

click on 'Browse' button and locate the mail account name:

eg: C:\Users\Username\AppData\Roaming\Thunderbird\Profiles\profile name\Mail\mail account name

then click on OK to save changes.

Close and reopen Thunderbird.

Can you see the account and emails etc?