backing up ac iv: black flag download
unlike previous ubisoft games where had to backup the installer before you installed (otherwise uplay erased the installer after installing and you couldn't backup the game dir and properly replace it meaning the game wouldn't run), ac iv: black flag is different. you can actually backup the game directory under ubisoft game launcher/uplay/games/assassin's creed iv black flag. Just backup that directory and replace whenever you want. enjoy!
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