xsmokex20 is correct. The option only allows you to get back the tokens that you've spent during that prestige. So if you used it at lvl 1 you wouldn't get anything because you haven't earned anything yet. Also, note that had you used it later in the prestige, you would get all of the ones that you used during that prestige back but everything (other than perm unlocks) would be locked again. It's not as grand an option as you would think it would be.