Stepwise Procedure of the Software to understand the complete working. Refer to each screen :
step 1
Install & run the software.
step 2
Now, you can select MBOX files or entire folder of MBOX files
step 3
Now, files successfully added into the software. Click on "Next" button.
step 4
You can apply filter filter to import selected data, Then click "Import" button.
step 5
Now, MBOX files successfully added into Thunderbird