Baseson Shin Koihime Musou Otome Ryouran Sangokushi Engi Download

I want to ask if i already have the shin koihime musou (jap ver) and someday the english patch is completed and i download it can i just run the patch or i must download it again and run the patch. please reply ASAP

Baseson shin koihime musou otome ryouran sangokushi engi download