Converting .wlmp projects to .mp4 format.
Converting Windows Live Movie Maker Projects directly to MPEG-4 Videos (.wlmp to .mp4 conversion) should be quite straightforward, even though your options are limited to using the original software.
Use Windows Live Movie Maker, which allows users to export its WLMP projects in MP4 format.
We are not aware of any video editing software or (online) conversion tool capable of converting WLMP to MP4.
A proprietary video editor for Microsoft Windows