hay guys just starting out and just about to finish burning for you ,so how do i go to another part like double down or another one ?

Just speculating here - did it state that case 1 is closed.
Maybe you can then play load game and see if there is a choice. Keep us posted.

Hi no I didn't finish that part .

It looks like from video walkthrough that after finishing one case, you can click "load game" from menu and you select a new game. Maybe a gamer can verify this.

yes your right , i will have to go back and find my last saved part , i didn't mark it so it's going to take some time ,also playing Sanitarium.... yes I went back and checked that out ,U have to finish 1 part and then U can go on to the next part .