Deleting Files/Multimedia
To delete multimedia or other files from your publication, navigate to the publication on YUDU Publisher, selecting the Files menu. here one can see the red Delete buttons to the far right of the window:
Note - the file cannot be in use by a preview or published publication when attempting to delete it, so make sure to navigate to the Edit Pages tab and ensure that a preview or published version does not contain the content you are attempting to delete.