By default, your work is auto-saved periodically while in progress, even if you have not given the drawing a name. This makes it possible for you to recover unnamed files.
The auto-saved files are stored on the same location as you load your drawing. In case you have not saved the drawing in the usual way, auto-saved files can be found in the catalog: My Documents\CET Documents\autosave.
The easiest way to locate your auto-saved files is to use the Open dialog box.
You activate/deactivate the auto-saved feature in the Control Panel which is accessed from the File menu. In the Control Panel dialog, select the Security tab.
In the Control Panel you can also change the number of auto-save files per drawing.