Cannot find ASV file

I am not able to find the autosave .asv versions of my .m code files when matlab hangs (I am looking for the most recent autosave, but absolutely none of them seem to exist. the following link suggests they should exist, and to my knowledge I never turned off the autosave option (i am using the latest version of matlab)

http://www.mathworks.com/company/newsletters/articles/automatically-save-backup-m-files-with-the-matlab-editor.html

many times when I write code, I will execute as a test, not realizing that the program will overload and matlab will hang. when this happens, I would like to be able to retrieve the last autosave that had existed