Every time I save, Screenwriter asks for a new filename

If EVERY time you do a FILE > SAVE command Screenwriter asks for you to select a NEW filename, there are a few possibilities:

1. When Windows Screenwriter creates a new, empty document, it names the temporary file NONAME.MMSW, NONAME1.MMSW, etc.  These are intended to be temporary, reserved names, and not a normal saved filename.  Do A FILE > Save As and change the filename to whatever name you wish.
   
   
2. The document isn't allowing write access.  This could be for several reasons, but most likely, the location of the file just doesn't have the proper access permissions.  Is the file you are editing located on your hard disk, or on a cloud-based drive?  (Screenwriter does not support working with files on a cloud drive, such as One Drive or Dropbox) Are you logged in as an administrator (otherwise, you MIGHT not have permissions to write to the file)?  
   
   
3. Is the document "read only" or "locked"?  On Windows, also look at Properties via the Windows File Explorer, and on the General Tab, make sure "Read only" is NOT CHECKED.  On Macintosh, select your document in the Finder and do FILE > Get Info (CMD+I), and make sure the "Locked" checkbox in the top (General) section is not checked.
   
   
4. Is the document's EXTENSION (the part at the end of the filename, after the period) .mmsw (or .MMSW)?  It MUST be.  Otherwise, you are editing a .BK or .TMB file -- which isn't what you should be editing.