Arcsoft Photo Studio?

im trying to remove this program from my computer but it's like it's invisible.
now when i double click my pictures it automatically takes me to this program and opens them up there. It use to just open them and i could resize and reajust anything from a simple screen. I want that screen back but cant seem to find where to remove this program!
HELP!

well i have it removed now. Took some time but i got it!
Now my pictures are opening under paint and they shouldnt...AHHHH!
What do your pictures open under? i have an HP, and when i use to double click it, it'd open right up so all i had to do was go to edit and resize it to what i wanted! any help is much appreciated!