Computer Program "Change" : Why is it not giving me that option? (Details follow)

Again my saga with not installing Adobe on a temporary computer. I opted to get Serif because it’s just an “in-between” program and I don’t need anything major to do an edit on this particular project. And it was easy to download, too.

Anyway, somehow, I checked (by mistake——misreading what they asked) the boxes so that now all my jpegs, and other files are now opening under “Serif”. What I have to do is go back to the Control Panel, get into Windows Vista and “Change” this particular computer program and uncheck the boxes.

At the top of the listing of all the programs (after clicking on Control Panel) it says, “To uninstall a program click on the program and choose, “Uninstall”, “Change” or “Repair.” But when I click on the program, a box comes up and the only option is “Uninstall: Yes or No”. I want to choose “Change” but I don’t see it as an option——can someone tell me where to find it?? Am I missing something?

Thanks in advance….to anyone who can shed light on this mystery.