There is also a manual method to convert DBX to PST. We can use Outlook Import feature to move .dbx files in .pst format.
Open Outlook, go to file Menu>>Open>>Import option
Select Import Internet Mail and Addresses>>Next
Choose Outlook Express and select the folders you want to import
Click On Finish after successful process click on Save in Inbox.
Detail Step by step process is given at
Visit :-
https://www.softknoll.com/dbx-to-pst-converter/
--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)