Also, I noticed that the new engine frontloader seems to allow me to load earlier versions of the engine such as 4.1 or 4.0, but it specifically will not let me revert to 4.2.0, and upon uninstalling 4.2.1 it will not let me download 4.2.0 again or let me specify what version I want, likely because 4.2.1 was a hotfix. You may want to pass that feedback along that prior versions other than the major updates would be desirable as well, especially for situations like this. Thanks!