Try this. Import the movie into WMM and put it on the timeline. Locate the
clip that has the title on it and right click, choose edit title, and delete
it. You must then resave your movie.
This is easier to do in timeline view.
Zoom in if necessary to be able to see them. They should be located in the
"Title Overlay" portion of the timeline where you can right click and select
delete.
-Wojo