Thanks for the replies. I have just noticed another snag, and this is also a biggie. It has left all the artwork in .12 files. I have tried using photoshop but that still leaves them in .12 files. Even rick clicking and open with doesn't change them back to JPEG.
It's problems like this that are bug bears to me. if you remove a program it shouldn't leave behind traces so you have to scrabble around to change them back, it should go back to default programs.