If you are looking for a solution to export Window Live Mail to Outlook PST format, I recommend using the eSoftTools Window Live Mail to Outlook Converter, which quickly converts WLM files to outlook pst file format. The tool provides a more user-friendly interface so, it's easy to use in which users can split huge size of PST files into small multiple pst files. The converted pst files from WLM is in a Unicode format so it's easily opened in any windows version up to 10.
Read More:- Window Live Mail to Outlook Converter