I use Pinnacle Studio 16 to

I use Pinnacle Studio 16 to edit my travel videos. In view of lenght it is not possible to complete the session in one go. With previous Sudio versions I used to save the project as "movie in progress" and resume editing at a future time. It seems that with Sudio 16 I can't find the method to do it. It seems that it cannot be done. What am I doing wrong? (I have Pinnacle studio 16 on 'c' drive , captured movies from Video camers on Drive 'F' and I have another drive'E'available.)