The importandexportfilesworktogether, where the import filecontainsimportantinformationabout the export, helpinganynumberofclients to import a targetservice.
Thunderbird and other tools have to work by reverse-engineering, figuring out how PST fileswork by examining them carefully, because the format is not published.
Clear your browser cache, remove passwords to Web sites you use from work, such as your personal email or online bank account and delete any personal files on your work computer that aren't relevant to work.