When I started it, I noticed that it was a little window manager. The window manager allowed me to navigate through the directories, to was my image directory were. It was a view window that allowed me to click and drag all my images in order that I wanted them to appear in the animation. The frame time can be easily changed with the frame inspector. Frame inspector has the options for the single image, like size, transparency, and playing time, stuff like that.
Global inspector does the same thing for the composed image.
CoffeeCup Gif Animator 3 gives you the full version for 15 days. It's worth a download and try.