I think there is a VASSAL bug here. When a game is implicitly (via synch) or explicitly closed VASSAL should clear the name of the last file used so the user is prompted for a new name when they save. -SullyIt has been standard application behavior for decades that Save As prompts for a filename and on a successful write makes that file the current file, while Save writes to the current file without prompting if there is a current file. The change in 3.2.17 is that we made VASSAL follow standard application behavior. There is nothing unusual and should be nothing unexpected about how Save works now.