where's the postfix??

is there any way to add a postfix in C1pro 4 AFTER the counter number of each image - like in 3.7.9?
e.g. I have to name my pictures like this
name_000_postfix.TIF
whereas 000 stands for the running number of each image.
In 3.7.9 I was able to add a postfix in the settings - can't find that option in C1pro 4.
Anyone?! Thanx!