The save command saves the contents of the project and workspace windows, including the position and options of all nodes; the contents of the log window are not saved but you can copy the contents of the window to the clipboard and save them in a text editor or word processing program.
If you a creating a new project, it is a good idea to save it with its new name immediately, and remember to save it at regular intervals.
You can save a project in one of two ways:
Click on the save button 
on the standard toolbar.
Alternatively, select the save command from the file menu (if the project has already been saved) or the save as command (if the file has not yet been saved, or if you wish to save the project with a different name).
WITNESS Miner automatically adds a .dlw extension to the filename.