Can you please give a short explanation what will the restore instruction do? Because I asked some of my friends, they can just plug in the PSoC 4 and use immediately.
The PSoC5LP or kitprog on the kit act as programmer and debugger to PSoC4 .It may be possible that the bootloadable image of Kitprog on your kit got corrupted .
Its clearly mentioned in the CY8CKIT-042 PSoC Pioneer Kit Guide how to restore the kitprog factory image in such case.
It may be possible that the other kits do not have a corrupted kitprog image