I just installed this (apparently free) program and spent some time giving it a whirl on a set of 4 images of stars.
After a bit of mucking around I thought I had got it to work, but the final image comes as just "overlays" of the original 4.
That is, they are not properly superimposed, even though I took pains to do that very step.
Anyway, does anybody know of any good "help/how-to/userguide" for this program?
I feel a bit about this.