You're fine to reload them with whatever you want. No need to order new ones.
The ones that come pre-loaded are merely for convenience. You can order blank ones now, for same price, which is what I usually recommend to our customers. I've found that more often than not, by the time the customer gets them, they are wanting to load a newer version onto it than what's currently on it.
It's also not a bad idea to have a few spare laying around, too, for quick replacements in case of failures.
