So I am a student in my Advanced 3d Animation class and just to my luck like last year, the computer I was assigned to have issues with Maya. This time, Maya won't close when I try to close it. All my stuff is on my USB so I can't safely remove it while Maya is on. Now, my materials get messed up everytime I start up Maya and are assigned to the wrong faces. Before I could fix this by re-assigning the materials to their proper faces but now, they refuse to be assigned. Is there a way I can fix this and/or uncorrupt my files?