I opened old ps files generated with 15.1 as usual from NetBeans.
The issue here is that with “no import” I got plain text datas displaying; with “import ps as pdf” the last page is always displayed in the wrong orientation (landscape when portait slected or portrait when landscape selected).
I don’t know if this is NetBeans that messed it up but it worked comfortably when using it in 15.1.