However, I can offer an about Folder Colorizer 2, including its purpose, features, legal ways to obtain it, and potential risks of using pirated keys.
: If you previously purchased a lifetime license for older versions, you must download the specific "Earlier Version" build from the Softorino Help Center to use your existing serial key. How to Get a Key Legally
If you're having trouble with a key not working, you should contact Softorino Support directly with your receipt.