Don't be sorry. And no, there is not a particles file in the main folder. Once inside of the mail folder, click on "media" then "particles". Then check. I know it's only one file, but still. Check around your computer's files, you may have misplaced the material file while downloading it. It could literally be anywhere wherever you installed FH, but it will most likely be hiding somewhere in the FH folder, or in any of the sub-folders in it.