ThunderStor is a System Utilities software developed by BitDaddys Corp.. After our trial and test, the software was found to be official, secure and free. Here is the official description for ThunderStor: ThunderStor offers the user a simple, fast and effective method to extract ThunderBird Mail from the mail box files to individual standard message files. A command line and windows interface offers a the use a clean method to extract, archive and protect your email! Extract attachments and even merge them into a single location too! you can download ThunderStor free now.