I have been using movie Maker for the past few years to make videos of my kids every year for their birthday.  Each year I open the original movie maker file and add new videos to the end.  I recently upgraded to Windows 10 and now my Movie Maker won't work.  I can't open the original files in a way that I can edit and add to them.  Does anyone have any suggestions?  I would either like to 1) find a solution to this problem and continue to use movie maker or 2) find an alternative program that I could open my movie maker file in a way that it could still be edited.  

Any help would be GREATLY appreciated!!!!

Thanks!!!!