Moving XTZ from existing Tezbox Account to Ledger


Hi All, I am very confused and not tech savvy at all. I have just “restored” my ICO wallet on Tezbox. I want to get my tezzies on a Tezbox wallet linked with Ledger. Stephen Andrews, in his tutorial on how to do this, says of one’s existing Tezbox wallet: “Clear that one and create a new one.” But, I have no idea what that means - to “clear” the wallet, and it sounds a bit scary. I don’t want to lose access to my Tezzies. Can anyone shed some light on this for me?