Please, note that in order to open MEPX file, you need Movavi Video Editor Plus or Movavi Video Suite - Edit Video.
MEPX file cannot be converted into the video by Video Converter. It can only be exported via Video Editor Plus.
MEPX is, essentially, an archive for the internal use of video editor, while Movavi Video Converter converts videos. You can also browse for supported formats on this page.
Please, note that you need to have all the media files in your disposal, in order to export your project.
Make sure you have one of the above-mentioned programs on your machine, open the project and click the Export button to turn your project into a video.
You can follow this page in our manual to learn how to export MEPX files.