To back them up, all you have to do is export that key.
Right-nudge the Favorites key and choose “Export.”
Save the REG file to whatever location you want.
How to Save or Transfer Your Favorite Registry Keys to Another PC
If you spend a lot of time inside your registry editor, you might already know that you can use the Favorites feature to add in a bookmark to a specific key in the registry, saving you immense amounts of time when you need to check a bunch of different keys.
