Update.zip contains all of the updated files since the last update. Just unzip the update file in your GAME folder overwriting any existing files. Be SURE and copy all WCX files to your Wildcat folder. I do not erase any existing datafiles when I update, but on occasion I may do so, if for instance I change the way data is saved. In the beta versions this may happen. When the program is released all updates that change the way data is saved will include a data conversion program. I do not do data conversion programs for beta versions. NOTE: This version does NOT erase any datafiles.