The definition of functionality is "A set of attributes that bear on the existence of a set of functions and their specified properties. The functions are those that satisfy stated or implied needs."
The ability to edit the ammount of frames is neither stated nor implied by Neobeo, or JSD, thus JSD does not lose functionality in the slightest.

EDIT- By the way, excerpt from #JJ2:
Neobeo, your product, JSD, has been charged of being STUPID, how do you plead?
hmmm... i plead "WHAT WOULD YOU LIKE TO SEE IN A NEW VERSION OF JSD "