Please have a look at his screenshots. The files inside my ThunderbirdPortable directory are a bit messed up.
This is the main folder ThunderbirdPortable\:
And this is ThunderbirdPortable\Data\Profile\:
You see, there are some files within the main folder which there really should not.
Maybe I done something I shouldn`t do with portable Thunderbird? I am using quick locale changer so I can change the language of English Thunderbird Portable (220.127.116.11) to German an back. Also the german dictionary is installed.
If I delete the wrong files inside the main folder or move them to the profile folder them will be created again after Thunderbird portable is shut down.