Back again, Stephen. However, I got fed up enough that I uninstalled PaintShop Pro completely. That also got rid of Corel Instant Viewer and allowed me to re-set Image Eye as my default image viewer.
Then reinstalled PaintShop Pro, and lo and behold, it did not reinstall Corel Instant Viewer! I don't understand how, but I got what I wanted and I'll settle for that!
Thanks for helping....