Those files looked like they're copies of the existing files in the Downloads folder, and they MAY cause problems like missing CC or crashes.
You need to get Delphy's Downloads Organizer from
MTS2. Read the information plus installation instructions on the site hosting the product before you use it. This program helps you organize your Downloads folder by checking for duplicate files and removing any if there's duplicates as well as checking to make sure you have the mods you want installed in your Downloads folder.