I am trying to make  training video's. When a new movie is complete, I use Save as.... to install it in memory in the video section. It has a file ending in: .wlmn  Later when I try to reload it to run it in Movie Maker it sometimes has no video content. Captions, music, the title etc are still there. This has happened randomly several times meaning I have lost many hours of work.

Even .wlmn video's not loaded but still in memory lose their video content. (Only Kilobytes left not Mega bytes)

When I have made movies previously the saved program file ended :   ....... .wmn (These old video's do not loose their contents)

Sometimes when I I try to load a   .wlmn file into Movie Maker a dialog box says: file not recognised.

Has Windows updates changed the file endings since  I last used the video program?

Has anyone got any ideas about what is going wrong???    Is it me or Movie Maker??   Blondy108