Movie Maker

I am using Windows Movie Maker on Windows 10 and have started having trouble halfway trough the project. I am putting in videos with their own music and then pictures in between the videos with their own music.  All the videos I am using have their own music and audio built into the file, and I am adding music to the pictures.  All was fine until I opened the project today and Movie Maker is no longer allowing me to put music in for the pictures.  I keep getting a notification that the music is playing after the last picture or video, but it is not, and Windows keeps suggesting to use to "fix-to-music" function. Whenever I click on that function it fits the entire project to whatever song I am trying to input at that time, which is annoying because I already have about 15 videos with their own music and 20 pictures with 3 audio tracks for those pictures. Is there any way I can go back to just clicking "add music" and putting it wherever in my project? Any advice is greatly appreciated.