Well and yes if you go the standard way through Setup.bat GenerateFiles.bat then GenerateFIles.bat fails with an error:
Setting up Unreal Engine 4 project files…
ERROR: A game project path was not specified, which is required when generating project files using an installed build or passing -game on the command line
GenerateProjectFiles ERROR: UnrealBuildTool was unable to generate project files.
Although all components are installed, how to rebuild the engine? Maybe you have a magic bat file that does it? The Imertable Saved folders I deleted also in the Binaries I deleted everything except those files that were in the original Source engine