Hi Clara,
Our surveys use the same class for all our Next buttons, and so I'm not sure that it's possible to hide just one Next button without extracting the code and changing the HTML. If you were willing to do this, you could go to Embed > Embed as Link > Download File and give each button a different class or id so you can hide only certain ones.
Please let us know if you have any questions and thanks for using the forum!
