question for unity3d resource management

hey, everybody!

i get a question for unity3d resource management.

we develop a game for window pc, have five levels, include some models, textures, scripts, and something else. the patch has 100MB. we have released a version marked 1.0.and after that, we modify some detail on models,and textures, the size of resource modified is 10M, do we need to release a whole new patch?how to manage resources to avoid the situation for modifying game resource frequently?

thanks everybody!