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I upgraded Thunderbird from 9 to 10 and now folders are missing.

In my Local Folders I had a folder named "Backup2". It no longer shows in Thunderbird.

But when I go to %APPDATA%\Thunderbird\Profiles\default\Mail\Local Folders I can see Backup2.sbd folder with all the subfolders inside. How to get Thunderbird to show it in the UI?

Other folders such as Backup and Backup3 are still working OK.

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@Psycogeek - It is Windows 7. I will try what you suggested. – user74328 Feb 13 '12 at 3:54
@Psycogeek - I mistyped it. Fixed now. – user74328 Feb 13 '12 at 3:59
@Psycogeek - Your profile may be not "default"? – user74328 Feb 13 '12 at 4:00
OK I found out how. I simply made a "New Folder" inside Thunderbird at the spot the missing foders were supposed to be and they magically appeared with all emails intact! I am not sure why Thunderbird 10 did not see them but anyway it works now! – user74328 Feb 13 '12 at 4:05
up vote 1 down vote accepted

Found the solution. I went into Thunderbird after backing up the profile folder, and made a "New Folder" at the location of the missing folder and gave it the same name. It was created and appeared with all the missing emails contained in it.

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