Q: iCloud Drive has turned all files in my Dropbox into .icloud files that cannot be opened

Did that, obv. Now it's taking hours to download my local files back onto the desktop. But the files within Dropbox are still mutant .icloud files that can't be opened. I don't like that iCloud Drive is messing with the local files on my desktop and changing all the file extensions within my Dropbox without asking. It should leave those the heck alone. This is Frankendrive!