If it does not appear as a extract file. Its maybe because you dont have a extractor program installed. 7-zip or WinRaR are needed to extract the files from the folder.
If you still having issue after that, it might be because the folder got force changed to something they should not be. And if thats the case, you can try change the folder type by enabling the extension names, and change the extention to .zip or .rar (Changeing files extension names can be problematic, so be sure to backup the file incase you break it)