Prior to version 3, Thunderbird has a bug that makes it fail to display mail folders that have a storage path length that exceeds 128 characters. If you run into this limit, you can display more folders by moving the profile or the accounts directory closer to the root of the drive, so that less of the total path length is wasted. Another solution is to rename your source mail folders to shorter names before converting them with Aid4Mail.
If you experience any issues, please don't hesitate to contact us by raising a ticket.
If you would like to buy an Aid4Mail license, visit the Aid4Mail website.