Screenshots - they're going to my Dropbox and I want them on my desktop. Help!

The other day when I took a screenshot I got asked if I wanted it to go to my Dropbox and I stupidly said "yes".

I want my screenshots to go to my desktop (where I can immediately see them). I've been trying suggestions I've found online - using Terminal to issue the following command:

“defaults write com.apple.screencapture location ”
Drag and drop the “Screenshots” folder that you created into the white area of the Terminal application window; this will automatically insert the file path of the Screenshots folder destination to the command Terminal line.

But it hasn't worked to return the screenshots to my desktop (at least a folder on my desktop called "Screenshots").

How do I get screenshots back to my Desktop?

I can't find anything in Dropbox to revert the shots to my desktop.