Folder Opens - Cannot Delete Folders

I was trying to change the icon of my file folders to something else, and somewhere it said that I could do that at the file types tab of folder options in the control panel. I tried it and it didn't work (not important). However, whenever I opened a folder, it just opened search. I went back and looked at the actions and I didn't see open in there, but find was there (not in bold or anything), so I guessed that it was "find"ing instead of opening. I added a new action called "Open" that used explorer.exe and set it to the default action, but now every folder opens in a new window. I can't delete the action at all and have no idea how to change it. I'm new here and am not sure if this thread is where it belongs. (First post btw).