Answer:
In case of a crash, a backup file is automatically created by RFEM. This file is not directly available to the user but can be restored when restarting the program. RFEM will prompt a dialog box asking if you want to Delete or Restore the file (Image 1).
If you select Restore, the automatic backup file is restored. The automatic backup file is dependent on the the time defined in Program Options & Settings (Image 2).
If you select Delete, your model will be opened from the point of your last manual save.