This "old school" garage door does not have an electric door opener. It is opened and closed by hand. A gust of wind blew the door on a box and now the door doesn't close all the way unless I push in the bottem outside left corner with my foot or knee and then it will. The bottom left corner is about 1/2 inch lower than the right, after the wind blew it on the box. I can't see that any brackets have moved. Any ideas I might try? Thanks!