Complete process is explicable just need to pick the files from desired DBX folder & start to export Outlook Express DBX to Outlook PST/MSG or as EML. Outlook Express to PST File Toolkit is relevant which not involves Outlook set & perfect to get desired outcome. To try DEMO it simply can be download and install to dig up how to convert Outlook Express to PST file? FREE demo allows converting and saving first 25 DBX items from each folder.