You’re certainly welcome. Also, maybe this will help: In the preferences set up there is a menu item for “Addons.” That gives you the option to look at lists of Plugins, Themes and Stacks. Choose Stacks, and in the bottom right corner you’ll see “Reveal in Finder.” That will take you to where all the RW stuff is stored on your drive. Just move your Stacks in the Stacks folder. And don’t be surprised if if you find there is a Stacks subfolder inside the Stacks folder. Make sure the Stacks you’ve downloaded are all in there.
I will defer to the knowledge of the experts on this forum about the technical processes. They certainly know more about this than I do. If my advice is wrong or ill-advised I will stand corrected. All I know is that this worked for me, so it may be worth a try.