Basically, the patch will only work for version 3.2b at the time, it's halted at 3.2b for a while now cause of the decryption, which means no it will not work on anything above 3.2b.
Regarding the patch, it simply changes the people the protag lives with BACK into being in family and related, as how the game was made and supposed to be.
Without the patch, the people in the house will not be related to the protag in any sort of way, making some things kinda awkward with how they just suddenly play out.