Editing Options When Right Click Folder

I followed this guide, to add options when you right click, but instead of editing folder, I actually edited file folder.It said at the bottom you need to go to HKEY_CLASSES_ROOTFoldershellCreate_File_Listing in the registry to remove it, but i couldn't find file folder.I want it back again so when i double click a folder, it opens the folder. I didn't know what the windows explorer .exe name was or where it was stored, so for the time being i have to right click>>Open