File did not save!!!
Hello, I am semi-new to this software but had just spent over four hours working on an arrangement for my a cappella group. I had a file that my friend was working on and thought that by pressing the "Save" button, the document would automatically be overwritten. When I got the whole arrangement the way I wanted it (PERFECT), I exited out of the software to go to sleep (being very tired at this point). I them thought I'd open the file just in case to see if it was all there... it wasn't. I checked the app data folder for the program but there was nothing in there either! PLEASE HELP!