There is no Reset Remote there is a Replace Remote which is only used to replace your present remote for that account with a different Harmony remote, it will not reset the remote.  The only way of clearing the remote is to first delete all Activities, then delete all Devices, then update the remote, there is no way of reseting the remote to before programming status.  If the OP sells or gives his remote to someone else, once that person creates an new Account and adds their devices and Activities and updates the remote the old programming in the remote will be replaced with the new settings.