As stated in the article, I hope this tool work as it is. But in my experience, MailsDaddy MBOX to PST converter is the best, which is a instant migration utility and more effective. This tool provide bulk export options and convert all the mbox files into PST at a time. This tool has user-friendly interface, so there is no technical knowledge required to use it. you can also merge all MBOX file into single or separate PST file format.

i found this tool on filehippo after a long search and it's working awesome. you may visit this link : https://filehippo.com/download_mailsdaddy-mbox-to-pst-converter/