The program automatically saves a back up copy of the current project file at one minute after the start of the program execution. The back up file is saved in the same directory as the program files and is named in the form ~statcato.tmp.mmddyyyyhhmmss.stc, where mmddyyyyhhmmss is a timestamp of when the file is created.
By default, auto save happens every five minutes. You can change the frequency by going to File > Options.
By default, the back up file is retained after the application exits. If you would like the back up file to be deleted after the application exits, you can change the auto save options by going to File > Options.