It's okay, we all have our dumb moments (me especially [I might be having one now]) but if your screen looks like mine then under the list of all the filetypes on your system you should have a button that says "Change" click on that and change the program to photoshop. It will not show photoshops Icon when you click okay but then when you close folder options, the filetype of your choice should now have a photoshop logo icon on it. I don't know if that made any sense but hopefully it helped in one way or another.
bana-sea-