the memory and saves for the game are listed else where on your pc, but for safety do this
have old game folder, and new one in the same location(inside a sub folder if you want)
rename the new zip folder to something to stop overwriting (In Heat New for example) when extracting click the "extra to |folder name|" instead of "extra here". (better with 7zip imo)
open the new game in the "In heat new" folder you just extracted, see if all is good, delete the old folder.