Using the Regain EML to PST Converter Tool simplifies the process of converting EML files to PST format. Start by launching the software and adding the EML files or folders you wish to convert. Next, select the destination location for the converted PST files. The tool provides a user-friendly interface with options to filter emails by date or specific criteria, ensuring precise conversion. Once the settings are configured, initiate the conversion process. The Regain EML to PST Converter Tool efficiently converts and saves the EML files as PST, ready for use in Outlook.