Whenever you find a tool that promised to do unnatural stuff make sure it does what it claims. In most cases the claims are false. There is a rumor that Microsoft is testing a tool that will self-heal the anniversary updates bugs. The information embedded in the file says a copyright date of 2015 and the Microsoft Mobile oy holds the copyright.
Though with a little more research it was confirmed that this tool was signed by Microsoft’s code-signing certificate and been hosted on an Azure Cloud but it has nothing to do with anniversary update. The best the app can do is to run a string of PowerShell commands to reset the Windows 10 device in an automated manner. Its GUI appeared to be borrowed from an old Nokia tool as it resembles the Nokia Software Recovery tool that was used to reset windows phone devices.
This tool appears to be designed for the internal use only for techs trying to resolve update issues and without documentation not for release to the general public use as it does far too much. Some engineers who tested it for its abilities are not very happy with what it can do.