1) Recently did some video editing on the Timeline. When finished I saved the Project with choice of name and in pds format. A few hours later I opened PD 19 again to do more editing on same edit work file. The edit pgm gave me a notice saying "you have not saved your file. Do you want to save it now?". All of this was on the same day. Why do these notices keep appearing?

2) I have several source files in avi format (from years ago). When the editing project is done, I want the edited files to be in mp4 format. Is format conversion done within the edit program where everything is in pds format? Or must it be done as a separate step after the edited files have been Produced?