The runtime download is certainly a requirement, that doesn’t mean that more things can go wrong though. What isn’t working now? The most common problem after the runtime dll is not waiting for the parts update to finish and/or closing the program before it finishes (a progress bar for that download is one of the projects on my list of things to fix). It that happens you need to delete the user directories to clear the corruption. There are a number of posts on how to do that or I can provide instructions.
Peter