Don't look for many bells and whistles in PhotoPerfect Express, because you won't find any. Choose a photo, then select the method of image optimisation you want from the right-side of the screen, and save the resulting cleaned-up photo.
In two of the methods, a watermark appears; if you want to use those methods without a watermark, you have to buy the for-pay version of PhotoPerfect Express. If you want additional editing features, you'll have to pay as well.
No, PhotoPerfect Express isn't a power tool, but then again, it's free. And if you want simple photo cleanup, it's worth the download.