@SpringsSong Yeah. It doesn't identify the API version from the API files, it just keeps a record of the filename of the build you downloaded last, and successfully installed. But earlier versions of the application didn't keep that information, so for now it will say they're unknown until you install a new build. You can do that at any time and you don't have to worry about cleanup. It keeps a record of what files were installed from the application. Uninstalls the previous build and installs the new one.