The rub with this software is that once you click on a picture in CCFinder, you will immediately see the limitations. You can download the photo to your computer for no charge, but color filters and PDF downloading are disabled by default until you pay a "donation" of $10. If you like the software and use it a lot, you may decide upgrading to the Plus model makes sense.
Operating CCFinder isn't a problem. Just enter your search term (as you would with any other search engine), choose which filter you want and press "go." The images that match your search term and filter will then be presented and you can click on one to see it in a much larger size.
On the larger image screen, you are presented with the various terms and conditions for that image so you don't run afoul of the photographer's wishes and misuse the image. You are told if you need to attribute the image to the photographer or not, under what circumstances the image can be used (commercial or non-commercial), and whether or not you can alter the photo in any way.
Overall, CCFinder is a nice little desktop program if you find yourself looking for the right image to accompany a blog post, or if you need some visual inspiration for designs of your own. The only thing stopping it from getting a higher rating is the constant nagging for the $10 upgrade. But if you can learn to ignore that, this is worth keeping on your PC.
Note: The Download button takes you to the vendor's site, where you can download the latest version of the software.