I used an earlier version of this tool, version 3.10.14 to help with an installation problem with the Adobe CS3 suite. That version seems no longer to be available. This current version only works on Mac OS X 10.11 El Capitan or above. That said, version 3 helped resolve the installation issues I was having with reinstalling CS3 last year. To run CS3 now, though, I needed a new serial number I got from Adobe (https://landing.adobe.com/en/na/products/creative-cloud/ctir-2113-exchange-serial-number-cs3-4.html#) using my old serial number, which no longer worked after I upgraded from OS X 10.9 Mavericks to El Capitan and then Sierra.For the time being at least my CS3 apps run on Sierra. I haven't tested High Sierra yet, so your mileage may vary. Interestingly, this tool is designed to remove files related to pre-release (beta) versions of Adobe software. But it works as well removing files that hamper running or reinstalling, as the description says, CS3 through CS6. This is a good thing for people who need to use older versions of their Adobe suite apps after upgrading the operating system. Why upgrading the OS causes problems for Adobe apps I don't know, but this tool helps resolve those issues. So does their proffering of new serial numbers, as mentioned above. The serial number means that I didn't have to reinstall CS3 after all to get it to run in Sierra. So I didn't need the Cleaner Tool this time around.Be sure to read the instructions carefully (https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html) before using this app. There are a number of steps that need to be followed in sequence. You will need the download versions of your software in order to reinstall it—the old DVDs no longer work. You can get CS3 here, https://helpx.adobe.com/creative-suite/kb/cs3-product-downloads.html, with your old serial number. I don't have links for CS4, 5 and 6. You'll have to dig them up yourself. ;-)