Hi, thanks for supporting the projects, much appreciated!
Ok, animations in SpritePad are all based on ranges (ie. A to B) of items in the sprite or tile sheet.
nb. sprite animations and tile animations are handled by different forms.
You can select a range of images using the LEFT mouse button without (then with) the SHIFT key held down.
Then click "Create animation from selection" from the toolbar or menu (the sprite/tile sheet form must be active).
Alternatively you can just use the From/To controls on the animation form to set desired frames.
Playback speed etc etc are all handled by the animator form.
I hope that helps.